"Sun, 18 Aug 2024 18:20:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240818
Only TIME
18:20:33
General datetime
2024-08-18 18:20:33Z
For Database
2024-08-18 18:20:33
For HTTP1.1
Sun, 18 Aug 2024 18:20:33 GMT