"Sat, 15 Jun 2024 20:20:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
20:20:35
General datetime
2024-06-15 20:20:35Z
For Database
2024-06-15 20:20:35
For HTTP1.1
Sat, 15 Jun 2024 20:20:35 GMT