"Sun, 18 Aug 2024 15:15:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240818
Only TIME
15:15:13
General datetime
2024-08-18 15:15:13Z
For Database
2024-08-18 15:15:13
For HTTP1.1
Sun, 18 Aug 2024 15:15:13 GMT