"Sat, 17 Jan 1970 00:19:29"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
00:19:29
General datetime
1970-01-17 00:19:29Z
For Database
1970-01-17 00:19:29
For HTTP1.1
Sat, 17 Jan 1970 00:19:29 GMT