It is from the movie Dillagi and sung by Jaspinder Narula.
It means:
Din shagana da chareya aao sakhiyon re
The auspicious day for the marriage beckons, come o friends
mera sajana, mera sajana
O my beloved, my beloved
ni veda sajiya milan badhaaiyaan ni
You have our blessings on your wedding day, Congratulations
Sajan doli, sajan doli, sajan doli leke aaore, ni mera sajana
O my beloved please bring the doli and take me as your bride (the doli is a traditional bridal chair used to bring the bride to her new home and the groom leads the way on a white horse)
O mera sajana
O my beloved
Din shagana da chareya aao sakhiyon re …
The auspicious day for the marriage beckons, come my friends… (repeat verse)