Months equal to September 1981
The month September 1981 has 30 days and starts on a Tuesday. September 1981 has 5 Tuesdays, 5 Wednesdays.
| Months which have the same number of days and starting weekday as September 1981 | |||
|---|---|---|---|
| Year | Month | Compared to September 1981 | Since last |
| 1971 | June | 10 years, 3 months before | |
| 1975 | April | 6 years, 5 months before | + 3 years, 10 months |
| 1976 | June | 5 years, 3 months before | + 14 months |
| 1977 | November | 3 years, 10 months before | + 17 months |
| 1980 | April | 17 months before | + 2 years, 5 months |
| 1981 | September | selected month | + 17 months |
| 1982 | June | 9 months after | + 9 months |
| 1983 | November | 2 years, 2 months after | + 17 months |
| 1986 | April | 4 years, 7 months after | + 2 years, 5 months |
| 1987 | September | 6 years after | + 17 months |
| 1988 | November | 7 years, 2 months after | + 14 months | Between years 1971 and 1991 this occurs 11 times. Note that holidays seldom match exactly. Selected month is highlighted. |
Which Years Have the Same Calendar?
Reuse your yearly calendar by finding years that have the same number of days and start on the same day of the week.
Which Months Have the Same Calendar?
Find months that have the same number of days and start on the same day of the week.
When Does a Date Fall on a Certain Weekday?
Do you feel dates like Friday the 13th occur often? This calculator tells you exactly when.
About repeating months
A year has 7 months containing 31 days, 4 months containing 30 days and the final month has either 28 or 29 days. All weekdays occur four times.
This means that:
- 31-day months repeat on average once every year.
- 30-day months repeat on average four times every 7 years.
- 29-day months repeat on average once every 28 years.
- 28-day months repeat on average 3 times every 28 years.