"Sat, 15 Jun 2024 13:35:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
13:35:12
General datetime
2024-06-15 13:35:12Z
For Database
2024-06-15 13:35:12
For HTTP1.1
Sat, 15 Jun 2024 13:35:12 GMT