While they usually host the current year, sometimes their archives or search functions can help:

: A shared link for a 2006 Marathi Calendar PDF exists in community-shared document folders.

Finding an official PDF for a can be tricky since it's quite old, but there are a few reliable community-shared links and digital alternatives available: Where to find the 2006 PDF

For a digital breakdown of 2006 dates without a PDF download, Drik Panchang’s 2006 Archive offers a highly reliable day-to-day view of Marathi festivals.

The Kalnirnay calendar is one of the most widely used almanacs (pañcāṅga) in Maharashtra. The provides daily tithi (lunar date), nakshatra (constellation), yoga, karana, sunrise/sunset times, religious festivals, and auspicious muhūrtas. This paper analyzes its role in agrarian, religious, and domestic life in 2006, before the widespread adoption of smartphone calendars.