Ruling · Vāmana Jayantī · 2050

Wednesday 28 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 53 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 Tuesday 27 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:45  12:33 madhyāhna ends
10:5711:2111:4512:0912:3312:5713:21

0 of 48 minutes covered

Midday of Wednesday 28 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:45  12:33 madhyāhna ends
Dvādaśī ends 12:37:29
10:5711:2111:4512:0912:3312:5713:21

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 15:52 on Tue 27 Sep to 12:37 on Wed 28 Sep.

    2050-09-27T07:51:46Z → 2050-09-28T04:37:30Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:45–12:33 on the 27th, 11:45–12:33 on the 28th.

    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 27th and 48 of 48 on the 28th.

    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 293 s < 300 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2050: Wednesday 28 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Vāmana Jayantī 2050 falls on Wednesday 28 September. Dvādaśī runs from 15:52 on Tue 27 Sep to 12:37 on Wed 28 Sep and covers all of madhyāhna that midday. It is 4 min 53 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2050/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 28 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 28 Sep
compat-drikpanchangComparison profileWed 28 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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles00:52 → 21:3712:2048 min12:190 min27 Sep
Chicago02:52 → 23:3712:1748 min12:170 min27 Sep
Jersey City03:52 → 00:3712:2348 min12:230 min27 Sep
Port of Spain03:52 → 00:3711:3348 min11:330 min27 Sep
London08:52 → 05:3712:2748 min12:270 min27 Sep
Durban09:52 → 06:3711:2348 min11:230 min27 Sep
Dubai11:52 → 08:3711:4642 min11:450 min27 Sep
Delhi13:22 → 10:0711:480 min11:480 min28 Sep
Kolkata13:22 → 10:0711:030 min11:030 min28 Sep
Singapore15:52 → 12:3712:320 min12:316 min28 Sep
Sydney17:52 → 14:3711:230 min11:2248 min28 Sep
Suva19:52 → 16:3711:340 min11:3348 min28 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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