December 18, 2025: कृष्णा पक्ष चतुर्‍दशी (Chaturdashi)

December 19, 2025: कृष्णा पक्ष अमावस्या (Amavasya)

In Jain tradition, tithi means the lunar day and can vary by local calculation rules (sunrise-based day, amanta/purnimanta month systems, etc.). The above names reflect the common tithi observed for those civil dates. If your sangh uses a different day-rule (uday tithi or a specific regional calendar), the observed date could shift by a day. You can read more about how tithi works in Jain practice here and more about tithi-related observances here