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Business Days in August 2027 for Singapore

August 2027 has 21 working days under the Singapore holiday calendar. August 2027 contains one Singapore holiday on a weekday. The month covers 31 calendar days, of which 9 are Saturday and Sunday. That count drives invoice cycles, payroll runs, and any contract that defines deadlines as a number of working days in Singapore.

working days

21

Calendar Days

31

Weekend Days

9

public holidays

1

Work Weeks

4.2

August 2027 business day calendar
SunMonTueWedThuFriSat
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9
National Day
10
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17
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public holidays in August 2027

Mon, Aug 9National Day

Singapore August deadlines

National Day, 9 August, is a public holiday, and when it falls on a Sunday the Holidays Act makes the next day a public holiday instead. CPF contributions for July are due on its last day, with enforcement against an employer that has not paid them by August 14, or the next working day when the 14th is a Saturday, Sunday or public holiday. National Day 2027 is a Monday. August 14 is a Saturday, so the CPF date is Monday 16 August.

Those dates in 2027

None of the dates named above falls on a working day in 2027 under the Singapore calendar. A fixed calendar date advances by one weekday in a common year and two after a leap day, so which side of the working week it lands on changes on a four-year cycle rather than staying put.

DateWeekdayStatus under the Singapore calendarFirst working day on or after
August 14SaturdayWeekendAugust 16, 2027

This table resolves weekdays and nothing else. Whether an obligation actually moves when its date is not a working day is set by the instrument that creates it, and no shift rule is assumed here for any jurisdiction. The sources behind each calendar are listed in the source register.

Day-of-Week Distribution

The count of each weekday in August 2027. Useful for shift scheduling, weekly recurring billing, and any rota that depends on a specific day of the week landing in-month.

DayCount
Monday5
Tuesday5
Wednesday4
Thursday4
Friday4
Saturday4
Sunday5

Singapore reporting cycles and business-day rules

This calculator counts Monday to Friday and leaves out the 11 public holidays the Ministry of Manpower lists. When one falls on a Sunday, section 4(2) of the Holidays Act 1998 makes the next day that is not itself a public holiday a public holiday too, and the calculator leaves that day out as well. A holiday on a Saturday adds no public holiday under the Act, although MOM says an employee whose Saturday is a non-working day should get either a day off or salary in lieu; the calculator adds no day for it. The CPF Board's enforcement date, the 14th of the month after contributions fall due, moves to the next working day when it is a Saturday, Sunday or public holiday.

Sources for these rules

Checked October 13, 2026. All sources

August 2027 working days compared by country

Working-day counts vary across countries because each country observes its own public holidays. The table below shows August 2027 under 11 of the site's 25 holiday calendars; the summary above gives Singapore's own count.

How August 2027 compares year over year

August 2026 had 20 working days, so August 2027 has 1 more working day year over year. On the surrounding months, July 2027 has 22 working days and September 2027 has 22. Looking forward, August 2028 has 22 working days under the same Singapore holiday calendar.

Using this calculator in Singapore

Count the 21 business days of August 2027 when a CPF or IRAS date is near. CPF contributions for a month are due on its last day, and the CPF Board takes enforcement action against an employer that has not paid them by the 14th of the following month, or by the next working day when the 14th is a Saturday, Sunday or public holiday. A GST return and its payment are due one month after the end of the accounting period, and a company files its estimated chargeable income within three months of its financial year end, unless one of IRAS's exceptions applies.

How August 2027 is shaped

The headline count answers how many working days August 2027 contains. It does not answer where they sit, and for anything measured in consecutive days rather than cumulative days that second question is the binding one. What follows is derived entirely from the Singapore holiday calendar and a working week that treats Saturday and Sunday as the weekend, with no assumption about how any particular obligation behaves.

The middle month of the third quarter

August runs 31 days and sits in the middle of Q3, so it opens and closes nothing: no quarter, no half, no year. That makes it the month whose working-day count is least likely to be checked and most likely to be assumed. In a common year August shares its weekday alignment with February and March, which is the widest such group in the calendar.

In August 2027 that comes to 21 working days across 31 calendar days, against 22 in July 2027 and 22 in September 2027.

The month opens across a weekend

The 1st of August is a Sunday, a weekend day under the Singapore calendar, whose week runs against a Saturday and Sunday weekend. Nothing that settles on working days moves on it. A month that opens this way loses its first working day to the calendar before any holiday is counted, and monthly cycles keyed to the 1st all resolve forward to the same date, which concentrates them.

The month's first working day is Monday, August 2, and August 2027 carries 21 working days in total.

Five working stretches

August splits into five working stretches. That is the ordinary shape of a month whose only interruptions are its weekends, and it means the month's internal boundaries are all predictable a year in advance: nothing here depends on a holiday date moving.

The working days of August 2027 arrive in stretches of 5, 4, 5, 5, and 2 days. The longest unbroken stretch runs five days, from August 2 to August 6. A task needing more consecutive working days than that cannot be completed inside a single stretch, whatever the month's total looks like.

The month is front-loaded. It opens with five consecutive days and closes with two, so capacity thins toward the end. Work deferred out of the first stretch arrives in a shorter one, which is how a schedule that looked comfortable in week one stops fitting.

Three weekdays occur five times

A 31-day month contains four full seven-day cycles and three days over, so exactly three weekdays occur five times and the other four occur four times. In August 2027 the three are Sunday, Monday, and Tuesday. Which three it is follows entirely from the weekday the month opens on, which is why the working-day count of a 31-day month moves year to year even when its holidays do not.

Only Monday and Tuesday among them are working days, so part of the surplus is absorbed by the Saturday and Sunday weekend and never reaches the working total. That split is why two months of the same length can carry different working-day counts without any holiday being involved.

One closure, and where it lands

August 2027 carries a single Singapore closure on a working day: National Day on Monday, August 9. A holiday's cost to a month is not only the day it removes; it is also where the removal falls, because the same closure can extend an existing break or cut a working stretch in half.

It sits directly beside a weekend rather than inside a working week, so it extends an existing break instead of creating a new one. That is the cheapest position a holiday can occupy: the month loses a day but keeps its shape.

five working days pass before the closure and 16 follow it, which puts the break just short of the month's midpoint. A closure near the middle divides the month into two usable halves rather than trimming one end of it.

The closures around this month

August 2027 carries one Singapore closure of its own, and the months on either side add their own. Where a deadline sits close to a month boundary, the closure that moves it is as likely to be outside the month as inside it.

Looking outside the month, the last was Vesak Day on May 20, 2027, 73 calendar days before August began and the next is Deepavali on October 28, 2027, 58 calendar days after it ends.

Across the whole of 2027 the Singapore calendar puts eight closures on working days, of which one falls in August. That ratio, rather than the raw count, is what tells you whether a month is carrying more than its share of the year's downtime.

An early-week close

August runs out after the second working day of its last week. Most of that week belongs to the next month, so the tail of August 2027 is unusually thin: two working days carry whatever the month-end process needs, and the week's remaining capacity is not available to this period.

The last working day of August 2027 is Tuesday, August 31. Counting back from there, the third-to-last is Friday, August 27, four calendar days before the month closes.

The middle month of the quarter

August is the middle month of Q3. Middle months carry the least visibility in a quarterly cycle: the opening month sets expectations and the closing month is where they are settled, so a shortfall here is the one most likely to be noticed late.

Across the whole quarter there are 65 working days, of which 21 fall in August. The other two months carry July 2027 with 22 and September 2027 with 22. It is the smallest of the three, so the quarter's capacity sits mostly in the other two months and a plan that spreads work evenly across the quarter will over-commit August.

The week's first working day is the scarcest

The first working day of the week is the one August gives least often. Anything anchored to the start of the working week (a weekly kickoff, a Monday-morning cutoff, a start-of-week batch) fires fewer times this month than the calendar count suggests, because a closure has taken one of them out.

Counted as worked rather than as occurring, August 2027 gives Monday 4, Tuesday 5, Wednesday 4, Thursday 4, and Friday 4. A weekly commitment pinned to a particular weekday fires that many times in the month, which is the number a rota needs and not the one the calendar shows.

Where the month sits in the year

August sits in the middle of 2027 by working-day count under the Singapore calendar. The middle of that ranking is where a month's total is least informative on its own, because a mid-ranked month can be a long month carrying closures or a short one carrying none, and the two need different plans.

2027 carries 253 working days in total under the Singapore calendar. The longest month of the year is December 2027 with 23 and the shortest is May 2027 with 19, a spread of 4. August ranks 8th of the twelve with 21.

Singapore closures across the year

A month's working-day count only means something against the country's whole calendar. Two countries that share a weekend and happen to have the same closure-free month can still run very different years, and Singapore is placed as follows.

Across 2027 the Singapore closures fall 4 in Q1, 2 in Q2, 1 in Q3, and 1 in Q4. A further three holidays land on the Saturday and Sunday weekend and cost no working day at all, which is why a country's holiday count and its working-day loss are different numbers.

The longest uninterrupted run in the 2027 calendar sits between May 20, 2027 and August 9, 2027, 81 calendar days with no Singapore closure in between. Stretches like that are where multi-week work belongs, and they move from year to year whenever a movable holiday does.

Where the month sits in the year's closure pattern

Closures are not spread evenly across a calendar year. They cluster around fixed anniversaries and around whichever lunar or movable feasts a jurisdiction observes, so two adjacent months can carry very different loads, and the Singapore calendar is no exception.

2027 opens its Singapore closures with New Year's Day on January 1, 2027 and ends them with Deepavali on October 28, 2027. The densest month of the year is March 2027 with two closures on working days.

One working day more than last year

There is one more working day in August 2027 than in August 2026: 21 against 20. A single-day swing is the ordinary case, produced by the calendar shifting forward one weekday between consecutive common years, and it is large enough to matter to a monthly target and small enough to be missed.

August opens 2026 on a Saturday, 2027 on a Sunday, and 2028 on a Tuesday. That movement, one weekday in a common year and two after a leap day, is what makes the three counts differ. The number of closures on working days is the same in both years, so the whole of any difference comes from weekday alignment. Looking ahead, August 2028 carries 22 working days.

Where the month's anchor dates fall

Two of the common monthly anchor dates in August 2027 land outside the working week or on a closure. The table below resolves each one against the Singapore calendar, together with the first working day on or after it.

DateWeekdayStatus under the Singapore calendarFirst working day on or after
August 1SundayWeekendAugust 2, 2027
August 5ThursdayWorking dayAugust 5
August 10TuesdayWorking dayAugust 10
August 15SundayWeekendAugust 16, 2027
August 20FridayWorking dayAugust 20
August 25WednesdayWorking dayAugust 25
August 31TuesdayWorking dayAugust 31

The final column is arithmetic, not a legal conclusion. Whether an obligation actually moves when its date is not a working day depends on the instrument that sets it, and this site does not assume a shift rule for any jurisdiction. Where a rule is known it is stated in the holiday data methodology and on the country page it applies to.

Net terms dated in August 2027

An invoice dated the 1st of August on calendar-day Net 30 terms comes due on August 31, 2027, a working day under the Singapore calendar. Terms counted in calendar days move independently of the working week, so the same term written on two consecutive months can settle cleanly in one and roll across a closure in the other.

Invoice dateNet 30, calendar daysNet 60, calendar days
Dated August 1August 31, 2027September 30, 2027
Dated August 15September 14, 2027October 14, 2027
Dated August 31September 30, 2027October 30, 2027 (rolls to November 1, 2027)

Net 30 and Net 60 are commercial conventions rather than statutory periods, and both are counted here in calendar days, which is how they are almost always written. Where a contract counts in working days instead, use the between-dates calculator with the Singapore calendar selected, because the two produce different dates whenever a closure falls inside the term.

Sources and verification

Official source: Ministry of Manpower (mom.gov.sg) (opens in a new tab)

Cross-checked against this source on October 9, 2026.

See all official sources โ†’

For informational purposes only

This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.

Frequently Asked Questions

How many business days are in August 2027 under the Singapore holiday calendar?
August 2027 has 21 working days under the Singapore holiday calendar. The month spans 31 calendar days, of which 9 fall on a weekend and 1 is a Singapore holiday that lands on a weekday. The remaining 21 weekdays are countable as working days for invoicing, deadline tracking, and contract math.
Which Singapore holidays affect August 2027?
August 2027 contains one Singapore holiday: National Day on Monday, August 9. The calculator skips it. Regional or industry-specific closures may add further non-working days for narrower contract definitions; layer them into the calculator's Advanced options if needed.
What happens when a Singapore public holiday falls on a weekend?
Section 4(2) of the Holidays Act 1998: if a day specified in the Schedule falls on a Sunday, the day next following that is not itself a public holiday is declared a public holiday. The Sunday stays a public holiday under section 4(1). This site's data lists the added day in place of the Sunday, which is not a business day either way, and the calculator leaves the added day out. The Act adds nothing for a holiday on a Saturday, though MOM says an employee whose Saturday is a non-working day should get a day off or salary in lieu; the calculator keeps a Saturday holiday on its date. When two public holidays fall on the same day, section 5(2) of the Holidays Act lets the President declare an additional public holiday, on any day of that year, by notification in the Gazette; it is not automatic, and this site's data lists no such day. The Ministry of Manpower lists 11 gazetted public holidays: New Year's Day, Chinese New Year (2 days), Good Friday, Hari Raya Puasa, Labour Day, Vesak Day, Hari Raya Haji, National Day, Deepavali and Christmas Day.
Why does the Chinese New Year date shift each year?
The Schedule to the Holidays Act 1998 names the days, Chinese New Year (2 days) among them, and gives no dates. MOM publishes the dates for public holidays one year in advance, by the third quarter of the year before. In this site's data, Chinese New Year, Good Friday, Hari Raya Puasa, Vesak Day, Hari Raya Haji and Deepavali fall on a different date in every year it covers. For a year MOM has not yet published, the data holds calculated dates for Chinese New Year, Hari Raya Puasa, Vesak Day, Hari Raya Haji and Deepavali and marks each one (approximate); where this site has no date for one of those days, the data has no row for it. Check MOM's list once it is out before relying on one of those dates for a deadline.
Why does the business-day count vary year to year?
Two things shift the monthly count for Singapore. First, the day of the week the first of the month lands on changes the count of each weekday. Second, Singapore holidays anchored to a fixed date shift their weekday across years. Some years a fixed-date holiday lands on a weekend; some countries shift the observance to an adjacent weekday and some absorb it into the weekend. August 2026 had 20 working days, so August 2027 has 1 more working day year over year.
When is the last working day of August 2027?
The last working day of August 2027 under the Singapore calendar is Tuesday, August 31. The month's last calendar day is Tuesday, August 31, so the two are the same date this year. Counting back, the third-to-last working day is Friday, August 27.
How many working days in a row does August 2027 offer?
August 2027 has 21 working days in total, but they do not run consecutively. They arrive in five stretches of 5, 4, 5, 5, and 2 days, so the longest unbroken run is five days, from August 2 to August 6. No working day in the month is isolated between two closures.

Sources for these rules

Checked October 13, 2026. All sources

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