"Sun, 15 Sep 2024 15:56:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
15:56:21
General datetime
2024-09-15 15:56:21Z
For Database
2024-09-15 15:56:21
For HTTP1.1
Sun, 15 Sep 2024 15:56:21 GMT