It harked back to the old calendar wherein spring began the new year.
In the Victorian age, masked ball attendees wore dresses that either harked back to a Victorian idea of a previous era, evoked a painting, or had a thematic element, such as "night."
As the direct line of succession died out with Har Krishan, the guruship harked back at this point to Teg Bahadur, the second son of Har Govind and uncle of Har Rai.