The way DateTime works with epochs is weird, I goofed this by having my server/viewer timezone the same and not noticing.

Also fix an issue where you do ?epoch=... and then manually fiddle with the control: the control should win.

• Set viewer and server timezone to different vlaues.
• Created a countdown using ?epoch=....
• Created a countdown using ?epoch=... and fiddling with date controls.
• Created and edited a countdown using date/time control.
• Poked around Calendar to make sure I didn't ruin anything this time (browsed, created event, edited event).