"Fri, 16 Jan 1970 01:00:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
01:00:21
General datetime
1970-01-16 01:00:21Z
For Database
1970-01-16 01:00:21
For HTTP1.1
Fri, 16 Jan 1970 01:00:21 GMT