Assistant: Hello! I handle your requests in natural language, such as:
“Analyze the period from November 1, 2025, to April 25, 2028.”
or
“Add 100 business days to February 25, 2026.”
or
“Next Thursday at 2:12 PM + 124 working hours”
or
“I won't be working first week of next may (going to Greece)”
Assistant:
I understand all languages.
How many working days in year 2021?
Here is the detail of the calculation:
Because 2021 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 15 public holidays that do not fall during a weekend and we obtain 246 working days in 2021.
Here is the list of these 15 public holidays:
1. New Year's Day : Friday, 1 January, 2021
2. Coming of Age Day : Monday, 11 January, 2021
3. Foundation Day : Thursday, 11 February, 2021
4. Emperor's Birthday : Tuesday, 23 February, 2021
5. Shōwa Day : Thursday, 29 April, 2021
6. Constitution Memorial Day : Monday, 3 May, 2021
7. Greenery Day : Tuesday, 4 May, 2021
8. Children's Day : Wednesday, 5 May, 2021
9. Marine Day : Thursday, 22 July, 2021
10. Health and Sports Day : Friday, 23 July, 2021
11. Mountain Day (observance) : Monday, 9 August, 2021
12. Respect-for-Aged Day : Monday, 20 September, 2021
13. Autumnal Equinox Day : Thursday, 23 September, 2021
14. Culture Day : Wednesday, 3 November, 2021
15. Labor Thanksgiving Day : Tuesday, 23 November, 2021
And here are the 2 public holidays falling on a weekend:
1. Vernal Equinox Day : Saturday, 20 March, 2021
2. Mountain Day : Sunday, 8 August, 2021
Save 
Delete 
Copy 
