January 31
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| January 31 in recent years |
| 2025 (Friday) |
| 2024 (Wednesday) |
| 2023 (Tuesday) |
| 2022 (Monday) |
| 2021 (Sunday) |
| 2020 (Friday) |
| 2019 (Thursday) |
| 2018 (Wednesday) |
| 2017 (Tuesday) |
| 2016 (Sunday) |
January 31 is the 31st day of the year in the Gregorian calendar; 334 days remain until the end of the year (335 in leap years).