For “December 2025 tithi”, the exact Jain tithi for each English date depends on:

• Your city / country (time‑zone and sunrise time)
• Which panchang you follow (Digambar or Shwetambar, and which regional calendar)

Because of this, the tithi for a given date (e.g., 10 December 2025) can shift by a day from place to place, so I should not give you a fixed table without knowing your location and tradition.

To find accurate Jain tithis for December 2025:

1. Use a reliable Jain tithi calendar (Jain panchang) and set:

- Year: 2025 - Month: December - Your city / time‑zone

1. Or, check the panchang printed or announced by your own derasar / sangh.

For religious niyam (upvaas, 5‑tithi, festivals like Posh Dashami, etc.), always follow the tithi your local Jain community uses.

If you want, you can tell me:

• Your city/country
• Digambar or Shwetambar

and I can guide you more precisely on how to read the panchang for December 2025.

For a very simple explanation of what “tithi” is and why sometimes different places show different tithi on the same date, you can read more here