Karva Chauth in 2025 is observed on Friday, October 10. The fasting period starts on the morning of October 10 and continues until moonrise in the evening, which is around 8:13 PM IST. The Chaturthi tithi (lunar day for Karva Chauth) begins late on the night of October 9 (10:54 PM) and ends on October 10 at 7:38 PM, but the main observance and fast are on October 10 itself.
So, the correct date for Karva Chauth 2025 is October 10.