Ruling · Vāmana Jayantī · 1981

Friday 11 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 141 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 Thursday 10 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

0 of 48 minutes covered

Midday of Friday 11 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

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 15:00 on Thu 10 Sep to 15:05 on Fri 11 Sep.

    1981-09-10T06:59:49Z → 1981-09-11T07:05:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 10th, 11:51–12:39 on the 11th.

    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 10th and 48 of 48 on the 11th.

    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 8455 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1981: Friday 11 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1981 falls on Friday 11 September. Dvādaśī runs from 15:00 on Thu 10 Sep to 15:05 on Fri 11 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1981/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 11 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 11 Sep
compat-drikpanchangComparison profileFri 11 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles00:00 → 00:0512:2648 min12:250 min10 Sep
Chicago02:00 → 02:0512:2348 min12:230 min10 Sep
Jersey City03:00 → 03:0512:2948 min12:280 min10 Sep
Port of Spain03:00 → 03:0511:3948 min11:390 min10 Sep
London08:00 → 08:0512:3348 min12:330 min10 Sep
Durban09:00 → 09:0511:2948 min11:290 min10 Sep
Dubai11:00 → 11:0511:5248 min11:510 min10 Sep
Delhi12:30 → 12:3511:5412 min11:5442 min11 Sep
Kolkata12:30 → 12:3511:090 min11:0948 min11 Sep
Singapore14:30 → 14:3512:080 min12:0748 min11 Sep
Sydney17:00 → 17:0511:290 min11:2848 min11 Sep
Suva19:00 → 19:0511:400 min11:3948 min11 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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