1. Performing Devotional Service in Karttika (2)

    The execution of devotional service during Urja-vrata in the month of Karttika is especially recommended to be performed at Mathura. This system is still followed by many devotees. They go to Mathura or Vrndavana and stay there during the month of Karttika specifically to perform devotional services during this period.

    From NoD ch. 12