"Sat, 15 Jun 2024 09:40:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
09:40:12
General datetime
2024-06-15 09:40:12Z
For Database
2024-06-15 09:40:12
For HTTP1.1
Sat, 15 Jun 2024 09:40:12 GMT