"Fri, 16 Jan 1970 00:40:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
00:40:04
General datetime
1970-01-16 00:40:04Z
For Database
1970-01-16 00:40:04
For HTTP1.1
Fri, 16 Jan 1970 00:40:04 GMT