"Sun, 15 Sep 2024 19:42:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
19:42:18
General datetime
2024-09-15 19:42:18Z
For Database
2024-09-15 19:42:18
For HTTP1.1
Sun, 15 Sep 2024 19:42:18 GMT