Ruling · Dāmodara Dvādaśī · 1925

Saturday 1 August

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 86 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Saturday 1 August

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

48 of 48 minutes covered

Midday of Sunday 2 August

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

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 09:56 on Sat 1 Aug to 06:49 on Sun 2 Aug.

    1925-08-01T01:55:33Z → 1925-08-01T22:49:22Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:22–12:10 on the 1st, 11:22–12:10 on the 2nd.

    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 1st and 0 of 48 on the 2nd.

    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 5176 s

  5. 05

    Ruling

    Dāmodara Dvādaśī, Daqing, 1925: Saturday 1 August.

    confidence: determinate

Say it like this

In Daqing, Dāmodara Dvādaśī 1925 falls on Saturday 1 August. Dvādaśī runs from 09:56 on Sat 1 Aug to 06:49 on Sun 2 Aug and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1925/damodara-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 1 Aug
Ahargaṇa, classicalDisc centre, no refractionSat 1 Aug
compat-drikpanchangComparison profileSat 1 Aug
No institution has a recorded ruling for Daqing.

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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles17:56 → 14:4911:3548 min11:350 min1 Aug
Chicago20:56 → 17:4912:3248 min12:320 min1 Aug
Jersey City21:56 → 18:4912:3848 min12:380 min1 Aug
Port of Spain21:56 → 18:4911:4848 min11:480 min1 Aug
London02:56 → 23:4912:4248 min12:420 min1 Aug
Durban03:56 → 00:4911:3848 min11:380 min1 Aug
Dubai05:56 → 02:4912:0148 min12:010 min1 Aug
Delhi07:26 → 04:1912:0348 min12:030 min1 Aug
Kolkata07:26 → 04:1911:1948 min11:190 min1 Aug
Singapore08:56 → 05:4911:4748 min11:470 min1 Aug
Sydney11:56 → 08:4911:3830 min11:370 min1 Aug
Suva13:56 → 10:4911:490 min11:490 min2 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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