When only the event date is specified, i.e. no event start time, the current "When" line is :
"When: 23 Dec 2020 , EST"
Different format is needed depending on the event information filled in i.e. with or without start time, end date and end time.
I require to insert a series of "if" statement to determine the event information provided and insert the appropriate data on the "When" line without superfluous blank characters.
Having the capability to assign the output of a macro such as "{Event Date}" to a javascript variable would allow me to resolve this and similar other issues in event massages customization.