Ability to refer to the value of the start and end date in the time window messages

[avernet]

This capability could be integrated into Form Builder to avoid the need to repeat the start or end date/time. It is particularly useful for overriding default messages, such as replacing the available-from.message with "The form you requested is not available until {$available-from-date} at {$available-from-time}." We could support the following variables:

• $available-from-date
• $available-from-time
• $available-from-dateTime
• $available-to-date
• $available-to-time
• $available-to-dateTime

+1 from customer

[avernet]

• Possible implementation: using positional parameters
• Check if it works with dates, e.g. use output format for date, time, and dateTime