Ruling · Bhīṣma Dvādaśī · 1901

Thursday 31 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 665 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 30 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 31 January

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 00:51 on Thu 31 Jan to 00:00 on Fri 1 Feb.

    1901-01-30T16:50:46Z → 1901-01-31T16:00:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 30th, 12:08–12:56 on the 31st.

    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 30th and 48 of 48 on the 31st.

    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 39871 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Baoding, 1901: Thursday 31 January.

    confidence: determinate

Say it like this

In Baoding, Bhīṣma Dvādaśī 1901 falls on Thursday 31 January. Dvādaśī runs from 00:51 on Thu 31 Jan to 00:00 on Fri 1 Feb and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1901/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 31 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 31 Jan
compat-drikpanchangComparison profileThu 31 Jan
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 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles08:51 → 08:0011:4348 min11:430 min30 Jan
Chicago10:51 → 10:0011:4048 min11:400 min30 Jan
Jersey City11:51 → 11:0011:4643 min11:460 min30 Jan
Port of Spain12:51 → 12:0011:560 min11:565 min31 Jan
London16:51 → 16:0011:500 min11:5048 min31 Jan
Durban18:21 → 17:3011:150 min11:1548 min31 Jan
Dubai20:32 → 19:4111:490 min11:4948 min31 Jan
Delhi22:12 → 21:2112:020 min12:0248 min31 Jan
Kolkata22:12 → 21:2111:170 min11:1748 min31 Jan
Singapore23:46 → 22:5511:490 min11:4948 min31 Jan
Sydney02:51 → 02:0011:440 min11:4448 min31 Jan
Suva04:46 → 03:5511:510 min11:5148 min31 Jan
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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