Here is the step-by-step fix for the most confused periods of that year:

Here is a cheat sheet of fixed dates for major events:

Fixing Your Pambu Panchangam 2010-11: A Guide to Resolving Date, Tithi, and Nakshatra Discrepancies

The Pambu Panchangam is revered for its precision, particularly in Tamil astrology. Named after the sage “Pambu” (Snake), it follows a unique computational system that sometimes differs from other popular almanacs like the Vakya or Thirukkanitha.