Ruling · Bhīṣma Dvādaśī · 1909

Monday 1 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 48 minutes.

Decide it for

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 Monday 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

Midday of Tuesday 2 February

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

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 10:22 on Mon 1 Feb to 11:20 on Tue 2 Feb.

    1909-02-01T02:22:14Z → 1909-02-02T03:20:10Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 1st, 12:08–12:56 on the 2nd.

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

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 1st and 0 of 48 on the 2nd.

    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 2882 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Baoding, 1909: Monday 1 February.

    confidence: determinate

Say it like this

In Baoding, Bhīṣma Dvādaśī 1909 falls on Monday 1 February. Dvādaśī runs from 10:22 on Mon 1 Feb to 11:20 on Tue 2 Feb and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1909/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 1 Feb
Ahargaṇa, classicalDisc centre, no refractionMon 1 Feb
compat-drikpanchangComparison profileMon 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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles18:22 → 19:2011:4348 min11:430 min1 Feb
Chicago20:22 → 21:2011:4148 min11:410 min1 Feb
Jersey City21:22 → 22:2011:4648 min11:460 min1 Feb
Port of Spain22:22 → 23:2011:5648 min11:560 min1 Feb
London02:22 → 03:2011:5148 min11:510 min1 Feb
Durban04:22 → 05:2011:4548 min11:460 min1 Feb
Dubai06:03 → 07:0111:5048 min11:500 min1 Feb
Delhi07:52 → 08:5012:1148 min12:110 min1 Feb
Kolkata07:52 → 08:5011:2648 min11:270 min1 Feb
Singapore09:22 → 10:2011:5448 min11:540 min1 Feb
Sydney12:22 → 13:2011:4510 min11:4548 min1 Feb
Suva14:17 → 15:1511:510 min11:5148 min2 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

About Ahargaṇa