Time & Date Calculator App for iOS
See how long remains before a deadline or exactly when those 30 days are up.
Date Calculator: Add to or Subtract From a Date
Enter a start date and add or subtract any number of days, months, or years.
From Saturday, 30 April 1966
Added 666 months, 6 days
Normalized to 55 years, 6 months, 6 days
Result: Friday, 5 November 2021
If the larger units (months/years) are added before the smaller units (days).Alternative result: Saturday, 6 November 2021
If the smaller units (days) are added first◀ Make adjustment and calculate againStart Again ▶
Calendar showing period from 30 April 1966 to 5 November 2021
| April 1966 | ||||||
|---|---|---|---|---|---|---|
| 0 days added | ||||||
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
| 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 | |
| May 1966 | ||||||
|---|---|---|---|---|---|---|
| 31 days added | ||||||
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
| 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 | |||||
| June 1966–October 2021 | ||||||
|---|---|---|---|---|---|---|
| June 1966–October 2021: 20,242 days added | ||||||
| November 2021 | ||||||
|---|---|---|---|---|---|---|
| 5 days added | ||||||
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
| 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 | |||||
Help and Example Use
Date Calculators
- Date Calculator – Add or subtract days, months, years
- Add to or subtract from a date and time
- Duration Between Two Dates – Calculates number of days.
- Time and Date Duration – Calculate duration, with both date and time included
- Birthday Calculator – Find when you are 1 billion seconds old
Related Links
- Date/calendar related services – Overview
- Calendar Generator – Create a calendar for any year.
- The World Clock – Current time all over the world
- Countdown to any date