Ruling · Dāmodara Dvādaśī · 1977

Thursday 25 August

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 3 min 06 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 Thursday 25 August

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:56  12:44 madhyāhna ends
Dvādaśī begins 12:40:53
11:0811:3211:5612:2012:4413:0813:32

3 of 48 minutes covered, the last 3

Midday of Friday 26 August

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

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 12:41 on Thu 25 Aug to 10:12 on Fri 26 Aug.

    1977-08-25T04:40:54Z → 1977-08-26T02:12:22Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 25th, 11:56–12:44 on the 26th.

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

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 3 of 48 minutes on the 25th and 0 of 48 on the 26th.

    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 186 s < 300 s

  5. 05

    Ruling

    Dāmodara Dvādaśī, Baoding, 1977: Thursday 25 August.

    confidence: boundary (margin)

Say it like this

In Baoding, Dāmodara Dvādaśī 1977 falls on Thursday 25 August. Dvādaśī runs from 12:41 on Thu 25 Aug to 10:12 on Fri 26 Aug and covers 3 of 48 minutes of madhyāhna that midday. It is 3 min 06 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1977/damodara-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 25 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 25 Aug
compat-drikpanchangComparison profileThu 25 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 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles21:41 → 19:1212:3148 min12:300 min25 Aug
Chicago23:41 → 21:1212:2848 min12:280 min25 Aug
Jersey City00:41 → 22:1212:3448 min12:340 min25 Aug
Port of Spain00:41 → 22:1211:4448 min11:440 min25 Aug
London05:41 → 03:1212:3848 min12:380 min25 Aug
Durban06:41 → 04:1211:3448 min11:340 min25 Aug
Dubai08:41 → 06:1211:5748 min11:560 min25 Aug
Delhi10:11 → 07:4211:5948 min11:590 min25 Aug
Kolkata10:11 → 07:4211:1548 min11:140 min25 Aug
Singapore12:11 → 09:4212:1348 min12:120 min25 Aug
Sydney14:41 → 12:1211:340 min11:3339 min26 Aug
Suva16:41 → 14:1211:450 min11:4448 min26 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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