Ruling · Bhīṣma Dvādaśī · 2091

Thursday 1 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 337 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 31 January

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:08  12:56 madhyāhna ends
11:2011:4412:0812:3212:5613:2013:44

0 of 48 minutes covered

Midday of Thursday 1 February

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:08  12:56 madhyāhna ends
11:2011:4412:0812:3212:5613:2013:44

48 of 48 minutes covered

Dvādaśī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 19:11 on Wed 31 Jan to 18:33 on Thu 1 Feb.

    2091-01-31T11:11:22Z → 2091-02-01T10:32:41Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 31st, 12:08–12:56 on the 1st.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 31st and 48 of 48 on the 1st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 20196 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Baoding, 2091: Thursday 1 February.

    confidence: determinate

Say it like this

In Baoding, Bhīṣma Dvādaśī 2091 falls on Thursday 1 February. Dvādaśī runs from 19:11 on Wed 31 Jan to 18:33 on Thu 1 Feb and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2091/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 1 Feb
Ahargaṇa, classicalDisc centre, no refractionThu 1 Feb
compat-drikpanchangComparison profileThu 1 Feb
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/bhishma-dvadashi · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 105

“S 12 Bhisma dvadasi (purvaviddha), Amalaki dvadasi, Santana dvadasi, Varaha dvadasi” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles03:11 → 02:3311:4348 min11:430 min31 Jan
Chicago05:11 → 04:3311:4048 min11:410 min31 Jan
Jersey City06:11 → 05:3311:4648 min11:460 min31 Jan
Port of Spain07:11 → 06:3311:5648 min11:560 min31 Jan
London11:11 → 10:3311:5048 min11:510 min31 Jan
Durban13:11 → 12:3311:450 min11:4547 min1 Feb
Dubai15:11 → 14:3312:080 min12:0948 min1 Feb
Delhi16:41 → 16:0312:110 min12:1148 min1 Feb
Kolkata16:41 → 16:0311:260 min11:2648 min1 Feb
Singapore19:11 → 18:3312:540 min12:5448 min1 Feb
Sydney22:11 → 21:3312:440 min12:4548 min1 Feb
Suva23:11 → 22:3311:560 min11:5648 min1 Feb
Profile · tradition
pac-rp@2026.1 · smarta
Rule
bhishma-dvadashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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