[SDC] change date format hint to lowercase

[shelaghm]

Is your feature request related to a problem? Please describe.
Date format shows up strangely as dd/MM/yyyy most likely due to capital M signifying Month, and small m signifying minutes, but this does not mean anything to the average user.

Describe the solution you'd like
Use all lowercase letters for date format

cc @santosh-pingle @kunjan8794 @khyativyasargus @jingtang10

[santosh-pingle]

looking into it, thanks!