datesupport documentation

I noticed a few threads refer to datesupport documentation here:

http://community.lithium.com/t5/Developers-Knowledge-Base/datesupport-FreeMarker-context-object/ta-p/9349

but that redirects me here, with access denied error:

http://community.lithium.com/t5/TKB-Archive-Knowledge-Base/datesupport-FreeMarker-context-object/ta-p/9349

Where can I review datesupport documention?

Does the datesupport object let me convert a LiQL message timestamp into a timestamp of the active user's timezone preference?

May I pass a format string to the getDateAsString() function?

Thank you,

Dave