Index Date Format?

[aspaceintime]

I have been playing around with the IndexDate format setting and have a few questions.

Here's my current setting for indexdate format: IndexDate.indexFormat={$date^|^| $origyear^^ ,

Q1: How can I add a label to the date so the results show Release Date:1957
Q2: How can I format to results of only show the 4 digit date

Attached is an example of the results I have now.