"Sun, 15 Sep 2024 23:48:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
23:48:40
General datetime
2024-09-15 23:48:40Z
For Database
2024-09-15 23:48:40
For HTTP1.1
Sun, 15 Sep 2024 23:48:40 GMT