How Many Days Until October 18?

How to Calculate Days Manually

No calculator? No problem. Here’s how to count days to October 18th, by hand:

Method 1: Simple Subtraction

If today is in October 2025:

• Subtract today’s date from 18.
• Example: On October 1, 2025, 18 - 1 = 17 days.

If today is before October 2025:

• Add remaining days in the current month, days in the months until September, plus 18 days in October.
• Example: On June 16, 2025, 14 days (June) + 31 (July) + 31 (August) + 30 (September) + 18 (October) = 124 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 in a cell to get days from today:

=DATE(2025, 10, 18) - TODAY()

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

=DATE(2025, 10, 18) - A1

Work Days Until October 18th

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

• Roughly 5 workdays per week.
• Subtract holidays (e.g., Labor Day on September 1, 2025).
• Example: ≈ 88 workdays, assuming one holiday (Labor Day).

Check out our Business Day Calculator for precise workdays.

More Countdowns

Track other dates or explore time tools:

• How Many Days Until October 19th?
• Date Calculator
• Days Between Dates Calculator
• Business Day Calculator
• How Many Days Until Calculator
• Countdown Calculator