Christmas Holiday

Hi,

I would like to setup a christmas holidaybetween two calendar days, i.e. 24th eve 6.30 to 25th eve 6.30 for a specific personnel area and employee sub group, The holidays on the holiday calendar are based on single days. I know this cannot be done through holiday calendar config, but through shema customization.Please help me in this regard.

Regards,

Anil.