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246 business days
2027 is a 365-day year in Japan with 261 weekdays (Mondays to Fridays). After removing 16 national public holiday dates, 246 working days remain. The fullest month is March with 23 business days; the leanest is February with 18. If regional and sector-specific holidays are also excluded, the total falls to 246.
| Month | Calendar days | Business days | Holidays deducted |
|---|---|---|---|
| January 2027 | 31 | 19 | 2 |
| February 2027 | 28 | 18 | 2 |
| March 2027 | 31 | 23 | 1 |
| April 2027 | 30 | 21 | 1 |
| May 2027 | 31 | 18 | 3 |
| June 2027 | 30 | 22 | 0 |
| July 2027 | 31 | 21 | 1 |
| August 2027 | 31 | 21 | 1 |
| September 2027 | 30 | 20 | 2 |
| October 2027 | 31 | 20 | 1 |
| November 2027 | 30 | 20 | 2 |
| December 2027 | 31 | 23 | 0 |
| Date | Day | Holiday | Deducted from working days |
|---|---|---|---|
| 2027-01-01 | Friday | 元日 | Yes |
| 2027-01-11 | Monday | 成人の日 | Yes |
| 2027-02-11 | Thursday | 建国記念の日 | Yes |
| 2027-02-23 | Tuesday | 天皇誕生日 | Yes |
| 2027-03-21 | Sunday | 春分の日 | Yes |
| 2027-04-29 | Thursday | 昭和の日 | Yes |
| 2027-05-03 | Monday | 憲法記念日 | Yes |
| 2027-05-04 | Tuesday | みどりの日 | Yes |
| 2027-05-05 | Wednesday | こどもの日 | Yes |
| 2027-07-19 | Monday | 海の日 | Yes |
| 2027-08-11 | Wednesday | 山の日 | Yes |
| 2027-09-20 | Monday | 敬老の日 | Yes |
| 2027-09-23 | Thursday | 秋分の日 | Yes |
| 2027-10-11 | Monday | スポーツの日 | Yes |
| 2027-11-03 | Wednesday | 文化の日 | Yes |
| 2027-11-23 | Tuesday | 勤労感謝の日 | Yes |