Ruling · Bhīṣma Dvādaśī · 1957

Tuesday 12 February

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 18 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 11 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 12 February

Taken. Dvādaśī reaches neither midday; the rule takes the second day.

madhyāhna begins 12:09  12:57 madhyāhna ends
Dvādaśī ends 11:50:34
11:2111:4512:0912:3312:5713:2113:45

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 14:47 on Mon 11 Feb to 11:51 on Tue 12 Feb.

    1957-02-11T06:47:25Z → 1957-02-12T03:50:35Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 11th, 12:09–12:57 on the 12th.

    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 11th and 0 of 48 on the 12th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 1089 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Baoding, 1957: Tuesday 12 February.

    confidence: determinate

Say it like this

In Baoding, Bhīṣma Dvādaśī 1957 falls on Tuesday 12 February. Dvādaśī runs from 14:47 on Mon 11 Feb to 11:51 on Tue 12 Feb, and reaches madhyāhna on neither day.

ahargana.org/baoding/festivals/1957/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 12 Feb
Ahargaṇa, classicalDisc centre, no refractionTue 12 Feb
compat-drikpanchangComparison profileTue 12 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles22:47 → 19:5111:4448 min11:440 min11 Feb
Chicago00:47 → 21:5111:4148 min11:410 min11 Feb
Jersey City01:47 → 22:5111:4748 min11:470 min11 Feb
Port of Spain02:47 → 23:5111:5648 min11:560 min11 Feb
London06:47 → 03:5111:5148 min11:510 min11 Feb
Durban08:47 → 05:5111:4648 min11:460 min11 Feb
Dubai10:47 → 07:5112:0948 min12:090 min11 Feb
Delhi12:17 → 09:2112:1242 min12:120 min11 Feb
Kolkata12:17 → 09:2111:270 min11:270 min12 Feb
Singapore14:17 → 11:2112:250 min12:250 min12 Feb
Sydney16:47 → 13:5111:450 min11:4548 min12 Feb
Suva18:47 → 15:5111:570 min11:5748 min12 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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