Ruling · Vāmana Jayantī · 1971

Thursday 2 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 490 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 Wednesday 1 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

0 of 48 minutes covered

Midday of Thursday 2 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

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 22:39 on Wed 1 Sep to 20:52 on Thu 2 Sep.

    1971-09-01T14:39:18Z → 1971-09-02T12:51:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 1st, 11:54–12:42 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 0 of 48 minutes on the 1st and 48 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: unstated → only-day · margin 29388 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1971: Thursday 2 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1971 falls on Thursday 2 September. Dvādaśī runs from 22:39 on Wed 1 Sep to 20:52 on Thu 2 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1971/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 2 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 2 Sep
compat-drikpanchangComparison profileThu 2 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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles07:39 → 05:5212:2948 min12:280 min1 Sep
Chicago09:39 → 07:5212:2648 min12:260 min1 Sep
Jersey City10:39 → 08:5212:3248 min12:320 min1 Sep
Port of Spain10:39 → 08:5211:4248 min11:420 min1 Sep
London15:39 → 13:5212:360 min12:3648 min2 Sep
Durban16:39 → 14:5211:320 min11:3248 min2 Sep
Dubai18:39 → 16:5211:550 min11:5448 min2 Sep
Delhi20:09 → 18:2211:570 min11:5748 min2 Sep
Kolkata20:09 → 18:2211:130 min11:1248 min2 Sep
Singapore22:09 → 20:2212:110 min12:1148 min2 Sep
Sydney00:39 → 22:5211:320 min11:3148 min2 Sep
Suva02:39 → 00:5211:430 min11:4248 min2 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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