Ruling · Bhīṣma Dvādaśī · 1987

Tuesday 10 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 448 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 Monday 9 February

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:09  12:57 madhyāhna ends
11:2111:4512:0912:3312:5713:2113:45

0 of 48 minutes covered

Midday of Tuesday 10 February

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:09  12:57 madhyāhna ends
11:2111:4512:0912:3312:5713:2113:45

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 20:24 on Mon 9 Feb to 22:56 on Tue 10 Feb.

    1987-02-09T12:24:27Z → 1987-02-10T14:55:37Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 9th, 12:09–12:57 on the 10th.

    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 9th and 48 of 48 on the 10th.

    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 26870 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Baoding, 1987: Tuesday 10 February.

    confidence: determinate

Say it like this

In Baoding, Bhīṣma Dvādaśī 1987 falls on Tuesday 10 February. Dvādaśī runs from 20:24 on Mon 9 Feb to 22:56 on Tue 10 Feb and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1987/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 10 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 10 Feb
compat-drikpanchangComparison profileTue 10 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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles04:24 → 06:5611:4348 min11:430 min9 Feb
Chicago06:24 → 08:5611:4148 min11:410 min9 Feb
Jersey City07:24 → 09:5611:4748 min11:470 min9 Feb
Port of Spain08:24 → 10:5611:5648 min11:560 min9 Feb
London12:24 → 14:5611:5115 min11:5148 min9 Feb
Durban14:24 → 16:5611:460 min11:4648 min10 Feb
Dubai16:24 → 18:5612:090 min12:0948 min10 Feb
Delhi17:54 → 20:2612:110 min12:1248 min10 Feb
Kolkata17:54 → 20:2611:270 min11:2748 min10 Feb
Singapore20:24 → 22:5612:550 min12:5548 min10 Feb
Sydney23:24 → 01:5612:450 min12:4548 min10 Feb
Suva00:24 → 02:5611:560 min11:5648 min10 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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