How to Count Days Between Two Dates: Examples

Counting days between two dates is common for holidays, deadlines, anniversaries, and payment due dates.

How to Count

1. Convert both dates to a day count from a reference date (e.g., Jan 1, 1970)
2. Subtract them to get the number of days between

Or use a date tool that handles leap years automatically.

Example

From January 1, 2026 to August 13, 2026:

• Jan 31 + Feb 28 + Mar 31 + Apr 30 + May 31 + Jun 30 + Jul 31 + 13 = 225 days

Inclusive or Exclusive

• Jan 1 to Jan 3 → 2 days apart (excluding the first day)
• Including both days → 3 days
• Always state which method you use

Where It Applies

• Leave days and holidays
• Project deadlines
• Anniversaries and contract ages
• Bill due dates

Try the date difference calculator to get instant results.