Punjabi Hindu households consult a pandit for dates, and a great many Sikh households do too, which the Rehat Maryada explicitly says is unnecessary.
The instrument is the jantri, the almanac, published annually in Punjabi, giving auspicious dates, planetary positions, festival dates, eclipse timings and agricultural advice.
The jantri is said to be among the most widely printed Punjabi publications of any year and it appears in a great many households that own no other book. No publisher releases print runs for it, so the claim is one everybody in the trade makes and nobody can document.
Marriage dates, house openings, the buying of vehicles, the start of construction and the departure for a journey are commonly set by it.
The Nanakshahi calendar reform was in part an attempt to give Sikhs a fixed solar calendar independent of this apparatus, and the reform was itself reversed in part.
A society that produced a scripture arguing at length against astrology and ritual timing consults an almanac before buying a tractor, and both facts are true at once.
The jantri is the annual almanac, giving the tithis, the auspicious days, the eclipses and the timings, and it is bought in enormous numbers across Punjab by households of every religion.
The pandit's role is fixing dates: the marriage, the mundan, the housewarming, the opening of a shop. Sikh families use gurdwara dates for the ceremony and often still consult a jantri for the timing.
The jantri publishers are a small commercial trade in Amritsar and Jalandhar and their calendars are among the highest circulation Punjabi print products of any kind.