Support Specified UTC Timezones for iCal Feeds

Support Specified UTC Timezones for iCal Feeds

ref: https://help.zoho.com/portal/en/community/topic/new-zc-variables-for-the-ical-feed
ref: https://help.zoho.com/portal/en/community/topic/support-named-calendars-for-ical-feeds

Please add a new user-definable variable for constructing an ical url that enables the definition of a calendar's timezone. 

Currently an ical's feed value for X-WR-TIMEZONE = UTC. I understand this offers the possibility of portability for the ical feed, but I have found a number of ical parsing calendars that fail to shift the date-time data to the local timezone. This is rooted in an issue I pointed out here. Rather than trash the whole ical system ZOHO Creator uses, a simple fix would be to add a new user definable variable for the timezone.

In the case of established ical feeds from ZOHO Creator, if this new  user-definable variable is not specified, then  X-WR-TIMEZONE  = UTC  (current behavior). If the ical url string is modified with this new variable,  X-WR-TIMEZONE  = some UTC value the user desires.

Considering how current ical urls are constructed, I would suggest this new variable be called ZC_TIMEZONE_VAR and be defined by the UTC format. For example, &ZC_TIMEZONE_VAR=UTC-5 for New York.

This would solve a number of problems I'm faced with for my application.

Thank You,

John M. Whitney