How Many Days Until March 21?

How to Calculate Days Manually

No calculator? Here’s how to count days to March 21st by hand:

Method 1: Simple Subtraction

If today is in March of the target year:

• Subtract today’s date from 21.
• Example: On March 1, 2026, 21 - 1 = 20 days.

If today is before March of the target year:

• Add remaining days in the current month, days in months until February, plus 21 days in March.
• Example: From June 17, 2025, 13 (June) + 31 (July) + 31 (August) + 30 (September) + 31 (October) + 30 (November) + 31 (December) + 31 (January) + 28 (February) + 21 (March) = 278 days.

Tip: Use this table for days in each month or try our Days Between Dates Calculator:

Method 2: Use Google Sheets or Excel

Enter this formula to get days from today:

=DATE(2026, 3, 21) - TODAY()

Or, from a specific date (e.g., in cell A1):

=DATE(2026, 3, 21) - A1

Work Days Until March 21st

Need workdays (excluding weekends and holidays)? Use our calculator or estimate manually:

• Roughly 5 workdays per week.
• Subtract holidays (e.g., Labor Day on September 7, 2025, Veterans Day on November 11, 2025, Thanksgiving on November 26, 2025, New Year’s Day on January 1, 2026).
• Example: workdays, assuming four holidays (Labor Day, Veterans Day, Thanksgiving, New Year’s Day).

Visit our Business Day Calculator for exact workdays.

Why March 21st?

Planning a spring event? Whether it’s a deadline, celebration, or milestone, our countdown helps you stay on track. Share it with others!

More Countdowns

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