Ruling · Bhīṣma Dvādaśī · 1999

Thursday 28 January

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 285 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 Thursday 28 January

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:07  12:55 madhyāhna ends
11:1911:4312:0712:3112:5513:1913:43

48 of 48 minutes covered

Midday of Friday 29 January

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:07  12:55 madhyāhna ends
11:1911:4312:0712:3112:5513:1913:43

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 07:22 on Thu 28 Jan to 05:10 on Fri 29 Jan.

    1999-01-27T23:22:23Z → 1999-01-28T21:10:06Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:07–12:55 on the 28th, 12:07–12:55 on the 29th.

    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 28th and 0 of 48 on the 29th.

    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 17086 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Baoding, 1999: Thursday 28 January.

    confidence: determinate

Say it like this

In Baoding, Bhīṣma Dvādaśī 1999 falls on Thursday 28 January. Dvādaśī runs from 07:22 on Thu 28 Jan to 05:10 on Fri 29 Jan and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1999/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Jan
Ahargaṇa, classicalDisc centre, no refractionThu 28 Jan
compat-drikpanchangComparison profileThu 28 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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles15:22 → 13:1011:420 min11:4248 min28 Jan
Chicago17:22 → 15:1011:400 min11:4048 min28 Jan
Jersey City18:22 → 16:1011:450 min11:4548 min28 Jan
Port of Spain19:22 → 17:1011:550 min11:5548 min28 Jan
London23:22 → 21:1011:490 min11:5048 min28 Jan
Durban01:22 → 23:1011:440 min11:4548 min28 Jan
Dubai03:22 → 01:1012:080 min12:0848 min28 Jan
Delhi04:52 → 02:4012:100 min12:1048 min28 Jan
Kolkata04:52 → 02:4011:250 min11:2548 min28 Jan
Singapore07:22 → 05:1012:530 min12:5348 min28 Jan
Sydney10:22 → 08:1012:440 min12:4448 min28 Jan
Suva12:22 → 10:1012:550 min12:5548 min28 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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