"Sat, 31 Jan 1970 00:19:07"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
00:19:07
General datetime
1970-01-31 00:19:07Z
For Database
1970-01-31 00:19:07
For HTTP1.1
Sat, 31 Jan 1970 00:19:07 GMT