"Sat, 24 Jan 1970 02:16:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700124
Only TIME
02:16:40
General datetime
1970-01-24 02:16:40Z
For Database
1970-01-24 02:16:40
For HTTP1.1
Sat, 24 Jan 1970 02:16:40 GMT