This February has a Friday the 13th. Next month will also have a Friday the 13th. There is interesting math behind this… from Grok.
Yes, February and March 2026 both have a Friday the 13th (today is one of them).
Consecutive months with a Friday the 13th can only occur in February and March during non-leap years, because that is the only case where the number of days between the 13ths (28) is a multiple of 7, keeping them on the same day of the week. In leap years, February has 29 days, shifting March 13th by one extra day. No other month pairs allow this, as their lengths (30 or 31 days) don’t align the 13ths on the same weekday.
To determine the frequency, we can examine the pattern over a long period (e.g., 1900–2100) using Python’s datetime module to check when February 13th falls on a Friday in non-leap years:
```python
import datetime
def is_friday_13(year, month):
try:
d =
datetime.date(year, month, 13)
return d.weekday() == 4 # Friday
except:
return False
# Check for consecutive Friday the 13ths (only possible in Feb-Mar non-leap)
occurrences = []
for year in range(1900, 2101):
if is_friday_13(year, 2) and is_friday_13(year, 3):
occurrences.append(year)
print(occurrences)
```
This yields: [1903, 1914, 1925, 1931, 1942, 1953, 1959, 1970, 1981, 1987, 1998, 2009, 2015, 2026, 2037, 2043, 2054, 2065, 2071, 2082, 2093, 2099].
The intervals between these years are consistently 11, 11, 6, repeating (e.g., 1914−1903 = 11, 1925−1914 = 11, 1931−1925 = 6, and so on). This pattern aligns with the 28-year calendar cycle (11 11 6 = 28). Within each 28-year cycle, there are 3 occurrences.
Thus, the average frequency is 3 occurrences every 28 years, or once every 28/3 ≈ 9.33 years—not exactly once every 9 years, but close.