Ruling · Vāmana Jayantī · 1968

Tuesday 3 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 1 min 47 s away. Say “contested”.

Decide it for

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 Tuesday 3 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:53  12:41 madhyāhna ends
Dvādaśī begins 11:51:24
11:0511:2911:5312:1712:4113:0513:29

48 of 48 minutes covered

Midday of Wednesday 4 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

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 11:51 on Tue 3 Sep to 09:55 on Wed 4 Sep.

    1968-09-03T03:51:24Z → 1968-09-04T01:55:13Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 3rd, 11:53–12:41 on the 4th.

    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 3rd and 0 of 48 on the 4th.

    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: unstated → only-day · margin 107 s < 300 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1968: Tuesday 3 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Vāmana Jayantī 1968 falls on Tuesday 3 September. Dvādaśī runs from 11:51 on Tue 3 Sep to 09:55 on Wed 4 Sep and covers all of madhyāhna that midday. It is 1 min 47 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1968/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 3 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 3 Sep
compat-drikpanchangComparison profileTue 3 Sep
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/vamana-jayanti · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“S 12 Visnuparivartanotsava, Sakrotthana (in any of the naksatras U. Asadha, Sravana & Dhanistha), Kalki dvadasi, Sravana dvadasi (when combined with naksatra Sravana), Vamana jayanti (madhyahna vyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 3rdCoveredMadhyāhna 4thCoveredRuled
Los Angeles20:51 → 18:5512:2848 min12:280 min3 Sep
Chicago22:51 → 20:5512:2548 min12:250 min3 Sep
Jersey City23:51 → 21:5512:3148 min12:310 min3 Sep
Port of Spain23:51 → 21:5511:4148 min11:410 min3 Sep
London04:51 → 02:5512:3548 min12:350 min3 Sep
Durban05:51 → 03:5511:3148 min11:310 min3 Sep
Dubai07:51 → 05:5511:5448 min11:540 min3 Sep
Delhi09:21 → 07:2511:5648 min11:560 min3 Sep
Kolkata09:21 → 07:2511:1248 min11:110 min3 Sep
Singapore11:21 → 09:2512:1048 min12:100 min3 Sep
Sydney13:51 → 11:5511:310 min11:3025 min4 Sep
Suva15:51 → 13:5511:420 min11:4248 min4 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
vamana-jayanti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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