Proposal - Add Timezone support for all Date/Time fields in CiviCRM
Add Timezone support for all Date/Time fields in CiviCRM. Currently, CiviCRM does not have any timezone handling for date/time fields - timezone is not stored with the value.
The first change is to start storing a timezone with the date/time field. After this is implemented then other changes can follow which deal with the display of the date/time field in the local time zone or showing the timezone for the value.
Have ability to set the timezone for a date/time field and store that value with the field. Default timezone should set using the CMS timezone default and/or a new setting on the Localisation Settings page.
Agileware Ref: CIVICRM-995