Singapore Working Days Calculator
Count Singapore working days between any two dates with all 11 gazetted public holidays excluded for 2026 — Chinese New Year (2 days), National Day, Deepavali, Hari Raya Puasa, Hari Raya Haji, Good Friday, Christmas, and more. For delivery windows, SLA tracking, and Singapore contract deadlines.
Count working days in Singapore between any two dates — all 11 public holidays excluded.
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Covers Singapore's 11 public holidays. Good Friday and National Day are fixed/algorithmic. Lunar-based holidays (Chinese New Year, Hari Raya Puasa, Hari Raya Haji, Vesak Day, Deepavali) are from approximate annual override tables — verify with MOM Singapore for exact dates.
Formula
Working Days = Weekdays − National public holidays falling on weekdays
Count all Monday–Friday days in the range, then subtract any of Singapore's 11 national public holidays that fall on those weekdays. If a public holiday falls on a Sunday, the following Monday is observed as a replacement holiday — a feature unique to Singapore's Employment Act.
Worked Example
Scenario: A Singapore supplier quotes a 10 working day turnaround starting Monday 4 August 2025.
National Day falls on Saturday 9 August 2025 — a weekend, so no replacement holiday applies in this case.
10 working days with 0 holidays falling Mon–Fri in range
Result: deadline falls on 15 August 2025
Always check whether National Day falls on a Saturday or Sunday in a given year — the replacement holiday rule affects your working day count.
Common Mistakes
- Using fixed dates for lunar holidays. Hari Raya Puasa (Eid al-Fitr) and Hari Raya Haji (Eid al-Adha) are based on the Islamic lunar calendar, so the dates shift each year. Never hard-code these dates across years without checking with the Singapore Ministry of Manpower.
- Forgetting the Sunday replacement rule. Under Singapore's Employment Act, if a public holiday falls on a Sunday, the following Monday is treated as a public holiday in lieu. This is unlike many other countries where the preceding Friday is substituted.
- Assuming Chinese New Year is one day. Singapore observes both Day 1 and Day 2 of Chinese New Year as public holidays — two consecutive days off. This can meaningfully extend project deadlines set around late January or early February.
Guide
How to Use
- 1
Enter start and end dates
Select the period you want to measure. Both dates are inclusive in the count.
- 2
Click Calculate
The tool counts Monday–Friday days and deducts Singapore's 11 national public holidays for the selected year.
- 3
Review excluded holidays
The result names any public holidays excluded within your date range.
- 4
Verify lunar holiday dates
For contracts extending across years, confirm the exact dates of Hari Raya Puasa and Hari Raya Haji at mom.gov.sg.
FAQ