How Many Days Until October 21st?

icon for a calendar with one day highlighted red icon for a calendar with one day highlighted red

Time Remaining Until October 21, 2025:

180 days
  • 5 months 27 days
  • 25 weeks 5 days
  • 4,320 hours

There are one hundred and eighty days remaining until October 21, 2025. This is calculated from today's date, which is April 24, 2025.

The following chart shows the days remaining until October 21st from today and various other days.
On DateCountdown to October 21st
April 20, 2025184 days
April 21, 2025183 days
April 22, 2025182 days
April 23, 2025181 days
April 24, 2025180 days
April 25, 2025179 days
April 26, 2025178 days
April 27, 2025177 days
April 28, 2025176 days

How Many Work Days Are Left Until October 21st?

Weekdays Until October 21st

128 days

You can use our business days calculator to find how many working days are between any two dates.

It's important to note that this does not consider holidays that may fall on a weekday, such as Indigenous Peoples' Day. So, you'll need to adjust this to account for holidays that you do not work.

How To Calculate the Days Until October 21st

You can count down the days until 10/21 in a few ways. The easiest is to use a calculator, such as our days until date calculator. You can also calculate the days manually or use a spreadsheet formula.

Method One: Calculate the Days Manually

If the current date falls in October, then you can simply subtract the current day of the month from 21. The resulting value is the number of days remaining.

days until 10/21 = 21 – current day in October

If the current date is not in October, then you can subtract the current day of the month from the number of days in the current month to find the remaining days in that month. Then, to that value, you can add the number of days in each month before October, and then add 21 for the number of days in October.

days until 10/21 = days left in the current month + days in next month + … + 21

Method Two: How To Calculate the Days Using Google Sheets

You can also calculate the number of days remaining until 10/21 using spreadsheet software such as Google Sheets or Microsoft Excel. You can do this using a few different formulas.

From the Current Date

If you want to find the number of days remaining from the current day, you can use the following function in a cell to calculate that number:

=DATE(2025, 10, 21) - TODAY()

Note that this formula calculates and displays the number of days once you type the formula into a cell and hit Enter.

From Any Date

If you want to find the number of days remaining from a specific date listed in another cell, in this case, from a date in cell A1, then you can use the following function to display the number of days remaining from the date displayed in cell A1:

=DATE(2025, 10, 21) - A1

More Date Countdowns