Ruling · Dāmodara Dvādaśī · 1933

Thursday 3 August

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 0 min 50 s away. Say “contested”.

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 2 August

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:00  12:48 madhyāhna ends
11:1211:3612:0012:2412:4813:1213:36

0 of 48 minutes covered

Midday of Thursday 3 August

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:00  12:48 madhyāhna ends
Dvādaśī ends 12:47:06
11:1211:3612:0012:2412:4813:1213:36

47 of 48 minutes covered, the first 47

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 15:56 on Wed 2 Aug to 12:47 on Thu 3 Aug.

    1933-08-02T07:56:02Z → 1933-08-03T04:47:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 2nd, 12:00–12:48 on the 3rd.

    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 2nd and 47 of 48 on the 3rd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 50 s < 300 s

  5. 05

    Ruling

    Dāmodara Dvādaśī, Baoding, 1933: Thursday 3 August.

    confidence: boundary (margin)

Say it like this

In Baoding, Dāmodara Dvādaśī 1933 falls on Thursday 3 August. Dvādaśī runs from 15:56 on Wed 2 Aug to 12:47 on Thu 3 Aug and covers 47 of 48 minutes of madhyāhna that midday. It is 0 min 50 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1933/damodara-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 3 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 3 Aug
compat-drikpanchangComparison profileThu 3 Aug
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/damodara-dvadashi · ruleset 2026.3-draft

Month
Śrāvaṇa, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 103

“S 12 Buddha dvadasi, Damodara dvadasi (purvaviddha), Visnu-pavitraropana.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 2ndCoveredMadhyāhna 3rdCoveredRuled
Los Angeles23:56 → 20:4711:3548 min11:350 min2 Aug
Chicago02:56 → 23:4712:3248 min12:320 min2 Aug
Jersey City03:56 → 00:4712:3848 min12:380 min2 Aug
Port of Spain03:56 → 00:4711:4848 min11:480 min2 Aug
London08:56 → 05:4712:4248 min12:420 min2 Aug
Durban09:56 → 06:4711:3848 min11:380 min2 Aug
Dubai11:56 → 08:4712:0148 min12:010 min2 Aug
Delhi13:26 → 10:1712:030 min12:030 min3 Aug
Kolkata13:26 → 10:1711:190 min11:180 min3 Aug
Singapore15:16 → 12:0712:070 min12:070 min3 Aug
Sydney17:56 → 14:4711:370 min11:3748 min3 Aug
Suva19:56 → 16:4711:490 min11:4848 min3 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
damodara-dvadashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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