Date in Menubar

[Geiserik *]

Hello,

Is it possible to display an alternative date in the menubar? I would
like to show the Hebrew date alongside the regular date, i.e. instead
of

Mon, Jan 30, 2012

I would like it to read

Mon, Jan 30, 2012 | Shevat 6, 5772

Any way to do this?

Thanks!