Free tool · checked 17 October 2026

Date calculator: days between dates and Singapore working days

Count the days between two dates, with and without the end date, find the date a number of days, weeks or months away, or count Singapore working days, Monday to Friday, excluding MOM’s public holidays for 2026 and 2027.

What do you want to work out? Days between two dates Add or subtract days, weeks or months Singapore working days between two dates

Start date

End date

Days between, not counting the end date: 24 days
Counting both the start and end dates: 25 days
In weeks: 3 weeks and 3 days
In years, months and days: 24 days

From Tuesday 1 December 2026 to Friday 25 December 2026.

Our convention for months: they are counted forward from the earlier date, and when that day does not exist in a month, the month’s last day counts (31 January to 28 February 2027 is 1 month).

Counts whole calendar days, with no times of day or time zones, for dates from 1 January 1900 to 31 December 2100. Working days assume a fixed Monday-to-Friday week with Sunday as the rest day; 5.5-day and 6-day weeks, shift rosters, half days, company holidays and leave are not modelled, and public holidays are known for 2026 and 2027 only. It does not decide how a contract, court or agency counts a deadline: check that rule or ask the agency. The starting dates are an example: change them, or use the Today buttons.

Rates and rules this tool uses

Public holidays in 2026: 11 gazetted days: Thursday 1 January (New Year’s Day); Tuesday 17 and Wednesday 18 February (Chinese New Year); Saturday 21 March (Hari Raya Puasa); Friday 3 April (Good Friday); Friday 1 May (Labour Day); Wednesday 27 May (Hari Raya Haji); Sunday 31 May (Vesak Day); Sunday 9 August (National Day); Sunday 8 November (Deepavali); Friday 25 December (Christmas Day). MOM: Public holidays, read 17 October 2026 (page says “Last Updated: 19 June 2026”).
Public holidays in 2027: 11 gazetted days: Friday 1 January (New Year’s Day); Saturday 6 and Sunday 7 February (Chinese New Year); Wednesday 10 March (Hari Raya Puasa); Friday 26 March (Good Friday); Saturday 1 May (Labour Day); Monday 17 May (Hari Raya Haji); Thursday 20 May (Vesak Day); Monday 9 August (National Day); Thursday 28 October (Deepavali); Saturday 25 December (Christmas Day). The 18 June 2026 press release lists the same dates. MOM: Public holidays, read 17 October 2026 (page says “Last Updated: 19 June 2026”).
Mondays after a Sunday holiday, as the public holidays page words them: “Monday, 1 June 2026, will be a public holiday if your rest day falls on 31 May 2026.” “Monday, 10 August 2026, will be a public holiday if your rest day falls on 9 August 2026.” “Monday, 9 November 2026, will be a public holiday if your rest day falls on 8 November 2026.” “Monday, 8 February 2027, will be a public holiday if your rest day falls on 7 February 2027.” MOM: Public holidays, read 17 October 2026 (page says “Last Updated: 19 June 2026”).
The 2026 Mondays, as the 2026 press release words them: Footnotes 2 to 4: “Monday, 1 Jun 2026, will be a public holiday.” “Monday, 10 Aug 2026, will be a public holiday.” “Monday, 9 Nov 2026, will be a public holiday.” Footnote 1 marks Hari Raya Puasa and Hari Raya Haji 2026 “Subject to confirmation”; the public holidays page, updated later, lists both dates without that note. MOM: Public Holidays for 2026 (press release, 16 June 2025), read 17 October 2026 (page says “Last Updated: 29 July 2025”).
Monday 8 February 2027, as the 2027 press release words it: Footnote 1 to 7 February 2027: “Monday, 8 Feb 2027, will be a public holiday.” MOM: Public Holidays for 2027 (press release, 18 June 2026), read 17 October 2026 (page says “Last Updated: 23 July 2026”).
The rest day on a 5-day week, and a holiday that falls on it: “If you are on a 5-day work week, Saturday would be considered your non-working day and Sunday would be your rest day.” “Rest day (Sunday), the next working day will be a paid public holiday.” “If a public holiday falls on your rest day, the following working day will be a paid public holiday.” MOM: Public holidays: entitlement and pay, read 17 October 2026 (page says “Last Updated: 30 July 2025”).
A holiday that falls on a Saturday in a 5-day week: “Non-working day (Saturday), you should get either a day off or salary in lieu.” “In accordance with the Employment Act, if a public holiday falls on a non-working day, you are entitled to another day off or one extra day's salary in lieu of the public holiday at the gross rate of pay.” MOM: Public holidays: entitlement and pay, read 17 October 2026 (page says “Last Updated: 30 July 2025”).
When MOM publishes a year’s public holidays: “MOM publishes dates for public holidays one year in advance, by the 3rd quarter of the previous year.” MOM FAQ: When will MOM release the public holiday dates?, read 17 October 2026 (page says “Last Updated: 15 July 2024”).

Next review: MOM’s public holidays and entitlement and pay pages before 1 January 2027 (especially the wording on Monday 8 February 2027); then MOM’s public holidays page by 30 September 2027, as MOM says it publishes a year’s dates by the third quarter of the year before: add the 2028 list and its Mondays, with tests, when it appears. General information, not tax, legal or financial advice.

How do I count the days between two dates?

Choose “Days between two dates” and enter both. The calculator gives two figures, because people count in two ways. Our worked example: from Tuesday 1 December to Friday 25 December 2026 is 24 days without the end date, the way you count days until an event, and 25 days counting both dates, the way you count the days of a booking. It also shows weeks and days, and years, months and days.

How do I add days, weeks or months to a date?

Choose “Add or subtract”, enter a number and pick a unit: 90 days after Tuesday 1 December 2026 is Monday 1 March 2027. A month moves to the same day of the month; when that day does not exist, the tool uses the month’s last day (our convention, stated beside the answer), so 31 January 2027 plus one month is Sunday 28 February 2027. Added working days start from the day after the start date: one working day after Thursday 24 December 2026 is Monday 28 December, because Christmas Day and the weekend are skipped.

How does it count working days in Singapore?

Monday to Friday, both dates included, less MOM’s gazetted public holidays on a weekday: MOM’s public holidays page lists 11 a year. For a holiday on a Sunday, that page says the Monday “will be a public holiday if your rest day falls on” the Sunday, and the entitlement and pay page says: “If you are on a 5-day work week, Saturday would be considered your non-working day and Sunday would be your rest day.” So on a Monday-to-Friday week the tool also removes 1 June, 10 August and 9 November 2026 and 8 February 2027, the Mondays the press releases for 2026 and 2027 name too.

A worked example: Monday 3 to Friday 14 August 2026 has 10 weekdays. National Day is Sunday 9 August, so Monday 10 August is a public holiday, leaving 9 working days.

What if a public holiday falls on a Saturday?

On a 5-day week, MOM’s entitlement page says “you should get either a day off or salary in lieu”. It names no date, so the tool removes no weekday for Hari Raya Puasa on Saturday 21 March 2026, or for Chinese New Year’s first day, Labour Day and Christmas Day, all on Saturdays in 2027. Ask your employer which day off, if any, you get.

Which years does it know public holidays for?

2026 and 2027. Outside them the result says no holiday is counted, and every weekday counts as a working day. MOM’s FAQ says: “MOM publishes dates for public holidays one year in advance, by the 3rd quarter of the previous year.” We will add 2028 when it appears. For 2027 in detail, see our 2027 public holidays and long weekends page and the leave planner for 2027.

What does this calculator not do?

It counts calendar dates from 1900 to 2100, with no times of day or time zones. Working days assume a fixed Monday-to-Friday week with Sunday as the rest day; 5.5-day and 6-day weeks, shift rosters, half days, company holidays and leave are not modelled. It does not decide how a contract, court or agency counts a deadline, which may exclude the first day or define a working day differently: check that rule or ask the agency. To plan a gathering, see our Christmas 2026 group plan.

Common questions

How many working days are there in December 2026 in Singapore?

22 on a Monday-to-Friday week: 23 weekdays, less Christmas Day on Friday 25 December.

How do I count the days between two dates including the end date?

Add one to the plain difference: 1 to 25 December 2026 is 24 days, or 25 counting both dates.

Is Monday 10 August 2026 a public holiday?

On a 5-day week, yes by MOM’s wording: the Monday “will be a public holiday if your rest day falls on 9 August 2026”, and MOM makes Sunday the rest day on a 5-day week.

Does the calculator know the 2028 public holidays?

No. MOM had not published them when we checked on 17 October 2026, so no holiday is counted outside 2026 and 2027, and the result says so.

About 4 minute read · Send a correction or suggestion

Sources

MOM’s public holidays page (mom.gov.sg)
entitlement and pay page (mom.gov.sg)
2026 (mom.gov.sg)
2027 (mom.gov.sg)
MOM’s FAQ (mom.gov.sg)