diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/utils/datetime.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/utils/datetime.h b/src/include/utils/datetime.h index 9b53ee38cc..548758a149 100644 --- a/src/include/utils/datetime.h +++ b/src/include/utils/datetime.h @@ -271,6 +271,11 @@ extern const char *const months[]; /* months (3-char abbreviations) */ extern const char *const days[]; /* days (full names) */ extern const int day_tab[2][13]; +/* + * These are the rules for the Gregorian calendar, which was adopted in 1582. + * However, we use this calculation for all prior years as well because the + * SQL standard specifies use of the Gregorian calendar. + */ #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) |