Ruling · Dāmodara Dvādaśī · 1917

Tuesday 31 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 600 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 30 July

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 Tuesday 31 July

Taken. The only midday Dvādaśī reaches.

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

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 00:58 on Tue 31 Jul to 22:48 on Tue 31 Jul.

    1917-07-30T16:57:45Z → 1917-07-31T14:48:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 30th, 12:00–12:48 on the 31st.

    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 30th and 48 of 48 on the 31st.

    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 35997 s

  5. 05

    Ruling

    Dāmodara Dvādaśī, Baoding, 1917: Tuesday 31 July.

    confidence: determinate

Say it like this

In Baoding, Dāmodara Dvādaśī 1917 falls on Tuesday 31 July. Dvādaśī runs from 00:58 on Tue 31 Jul to 22:48 on Tue 31 Jul and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1917/damodara-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 31 Jul
Ahargaṇa, classicalDisc centre, no refractionTue 31 Jul
compat-drikpanchangComparison profileTue 31 Jul
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 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles08:58 → 06:4811:3548 min11:350 min30 Jul
Chicago10:58 → 08:4811:3348 min11:320 min30 Jul
Jersey City11:58 → 09:4811:3829 min11:380 min30 Jul
Port of Spain12:58 → 10:4811:480 min11:480 min31 Jul
London17:58 → 15:4812:420 min12:4248 min31 Jul
Durban18:58 → 16:4811:380 min11:3848 min31 Jul
Dubai20:39 → 18:2911:420 min11:4248 min31 Jul
Delhi22:28 → 20:1812:030 min12:0348 min31 Jul
Kolkata22:28 → 20:1811:190 min11:1948 min31 Jul
Singapore23:58 → 21:4811:470 min11:4748 min31 Jul
Sydney02:58 → 00:4811:380 min11:3848 min31 Jul
Suva04:58 → 02:4811:490 min11:4948 min31 Jul
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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