Add UTC / Zulu time zone

[CrzLvl]

Would it be possible to add the ability to input a UTC time (e.g. 10:45Z, 01:00Z,etc.) and have Hourglass automatically convert the time zone to +0? Even if we had to add the current time zone (e.g. 10:45Z -8 for Pacific Standard Time) that'd be very helpful.

Many thanks for the excellent free application, Chris!