"Sat, 15 Jun 2024 15:50:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
15:50:36
General datetime
2024-06-15 15:50:36Z
For Database
2024-06-15 15:50:36
For HTTP1.1
Sat, 15 Jun 2024 15:50:36 GMT