Bhīṣma Dwādaśī is Māgha Śukla Dvādaśī — often tied to Bhīṣma’s last days in Māgha, distinct from Bhīṣmāṣṭamī. On the Panchang the civil date follows common Ekādaśī pāraṇā day — break the fast after sunrise, avoiding forbidden windows. Because tithi and nakṣatra boundaries are reckoned from local sunrise, the same observance can fall a day earlier or later in another city. Bhīṣma Dwādaśī — Māgha Śukla. Ekādaśī pāraṇā or Dvādaśī worship — sunrise timing and forbidden windows matter. Dates below for 2026 are computed from sunrise at your selected place. The same vrata can fall on an adjacent civil day in another city.