Ruling · Vāmana Jayantī · 2059

Friday 19 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 3 min 16 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 Thursday 18 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

0 of 48 minutes covered

Midday of Friday 19 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
Dvādaśī ends 12:32:34
11:0011:2411:4812:1212:3613:0013:24

45 of 48 minutes covered, the first 45

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 15:35 on Thu 18 Sep to 12:33 on Fri 19 Sep.

    2059-09-18T07:35:28Z → 2059-09-19T04:32:34Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 18th, 11:48–12:36 on the 19th.

    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 18th and 45 of 48 on the 19th.

    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 196 s < 300 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2059: Friday 19 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Vāmana Jayantī 2059 falls on Friday 19 September. Dvādaśī runs from 15:35 on Thu 18 Sep to 12:33 on Fri 19 Sep and covers 45 of 48 minutes of madhyāhna that midday. It is 3 min 16 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2059/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 19 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 19 Sep
compat-drikpanchangComparison profileFri 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles00:35 → 21:3312:2348 min12:220 min18 Sep
Chicago02:35 → 23:3312:2048 min12:200 min18 Sep
Jersey City03:35 → 00:3312:2648 min12:260 min18 Sep
Port of Spain03:35 → 00:3311:3648 min11:360 min18 Sep
London08:35 → 05:3312:3048 min12:300 min18 Sep
Durban09:35 → 06:3311:2648 min11:260 min18 Sep
Dubai11:35 → 08:3311:4948 min11:490 min18 Sep
Delhi13:05 → 10:0311:510 min11:510 min19 Sep
Kolkata13:05 → 10:0311:070 min11:060 min19 Sep
Singapore15:35 → 12:3312:350 min12:350 min19 Sep
Sydney17:35 → 14:3311:260 min11:2548 min19 Sep
Suva19:35 → 16:3311:370 min11:3648 min19 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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