"Sun, 15 Sep 2024 09:40:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
09:40:20
General datetime
2024-09-15 09:40:20Z
For Database
2024-09-15 09:40:20
For HTTP1.1
Sun, 15 Sep 2024 09:40:20 GMT