"Sun, 15 Sep 2024 19:40:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
19:40:02
General datetime
2024-09-15 19:40:02Z
For Database
2024-09-15 19:40:02
For HTTP1.1
Sun, 15 Sep 2024 19:40:02 GMT