Demo here

From the README:

Nanakshahi date function
The function’s work just like the php’s date() & time()function.
But it returns everything according to the Nanakshahi calendar.

For example
Timestamp:            1110790861
date() function returns:        Monday, 14 March 2005 – 01:01:01 AM
nanakshahi_date() function returns:    ਸੌਮਞਾਰ, 01 ਚੇਤ 537 – 01:01:01 ਸਵੇਰ

Instructions, the library, and the demo are included in the archive.

Originally from http://punjabis.netfirms.com/