There are **31 days** in the month of January.

The total number of days between Friday, January 1st, 2021 and Monday, February 1st, 2021 is
**31 days**.

This is equal to **1 month**.

This does not include the end date, so it's accurate if you're measuring your age in days, or the total days between the start and end date. But if you want the duration of an event that includes both the starting date and the ending date, then it would actually be 32 days.

If you're counting workdays or weekends, there are **21 weekdays** and **10 weekend days**.

If you include the end date of Feb 1, 2021 which is a Monday, then there would be
**22 weekdays** and **10 weekend days** including both the starting Friday and the ending Monday.

31 days is equal to **4 weeks and 3 days**.

The total time span from 2021-01-01 to 2021-02-01 is 744 hours.

This is equivalent to 44,640 minutes.

You can also convert 31 days to 2,678,400 seconds.

Su | M | Tu | W | Th | F | Sa |

1 | 2 | |||||

3 | 4 | 5 | 6 | 7 | 8 | 9 |

10 | 11 | 12 | 13 | 14 | 15 | 16 |

17 | 18 | 19 | 20 | 21 | 22 | 23 |

24 | 25 | 26 | 27 | 28 | 29 | 30 |

31 |

January 1st, 2021 is a Friday. It is the 1st day of the year, and in the 53rd week of the year (assuming each week starts on a Monday), or the 1st quarter of the year. There are 31 days in this month. 2021 is not a leap year, so there are 365 days in this year. The short form for this date is 1/1/2021.

Su | M | Tu | W | Th | F | Sa |

1 | 2 | 3 | 4 | 5 | 6 | |

7 | 8 | 9 | 10 | 11 | 12 | 13 |

14 | 15 | 16 | 17 | 18 | 19 | 20 |

21 | 22 | 23 | 24 | 25 | 26 | 27 |

28 |

February 1st, 2021 is a Monday. It is the 32nd day of the year, and in the 5th week of the year (assuming each week starts on a Monday), or the 1st quarter of the year. There are 28 days in this month. 2021 is not a leap year, so there are 365 days in this year. The short form for this date used in the United States is 2/1/2021, and almost everywhere else in the world it's 1/2/2021.

This site provides an online date calculator to help you
find the difference in the number of days between any two
calendar dates. Simply enter the start and end date to
calculate the duration of any event. You can also use this
tool to determine how many days have passed since your birthday,
or measure the amount of time until your baby's due date.
The calculations use the
Gregorian calendar,
which was created in 1582 and later adopted in 1752 by
Britain and the eastern part of what is now the United States.
For best results, use dates after 1752 or verify any data
if you are doing genealogy research. Historical calendars
have many variations, including the ancient Roman calendar
and the Julian calendar.
Leap years
are used to match the calendar year with the astronomical year.
If you're trying to figure out the date that occurs in
X days from today, switch to the **Days From Now calculator**
instead.