"Sun, 18 Aug 2024 13:20:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240818
Only TIME
13:20:20
General datetime
2024-08-18 13:20:20Z
For Database
2024-08-18 13:20:20
For HTTP1.1
Sun, 18 Aug 2024 13:20:20 GMT