"Sun, 15 Sep 2024 08:18:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
08:18:21
General datetime
2024-09-15 08:18:21Z
For Database
2024-09-15 08:18:21
For HTTP1.1
Sun, 15 Sep 2024 08:18:21 GMT