Ruling · Dāmodara Dvādaśī · 1924

Tuesday 12 August

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 15 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 Monday 11 August

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

0 of 48 minutes covered

Midday of Tuesday 12 August

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:59  12:47 madhyāhna ends
Dvādaśī ends 12:00:03
11:1111:3511:5912:2312:4713:1113:35

1 of 48 minutes covered, the first 1

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 14:50 on Mon 11 Aug to 12:00 on Tue 12 Aug.

    1924-08-11T06:50:02Z → 1924-08-12T04:00:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 11th, 11:59–12:47 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 1 of 48 on the 12th.

    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 75 s < 300 s

  5. 05

    Ruling

    Dāmodara Dvādaśī, Baoding, 1924: Tuesday 12 August.

    confidence: boundary (margin)

Say it like this

In Baoding, Dāmodara Dvādaśī 1924 falls on Tuesday 12 August. Dvādaśī runs from 14:50 on Mon 11 Aug to 12:00 on Tue 12 Aug and covers 1 of 48 minutes of madhyāhna that midday. It is 1 min 15 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1924/damodara-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 12 Aug
Ahargaṇa, classicalDisc centre, no refractionTue 12 Aug
compat-drikpanchangComparison profileTue 12 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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles22:50 → 20:0011:3448 min11:340 min11 Aug
Chicago01:50 → 23:0012:3148 min12:310 min11 Aug
Jersey City02:50 → 00:0012:3748 min12:370 min11 Aug
Port of Spain02:50 → 00:0011:4748 min11:470 min11 Aug
London07:50 → 05:0012:4148 min12:410 min11 Aug
Durban08:50 → 06:0011:3748 min11:370 min11 Aug
Dubai10:50 → 08:0012:0048 min12:000 min11 Aug
Delhi12:20 → 09:3012:0230 min12:020 min11 Aug
Kolkata12:20 → 09:3011:180 min11:170 min12 Aug
Singapore13:50 → 11:0011:460 min11:460 min12 Aug
Sydney16:50 → 14:0011:370 min11:3648 min12 Aug
Suva18:50 → 16:0011:480 min11:4748 min12 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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