Ruling · Vāmana Jayantī · 2009

Tuesday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 165 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 Monday 31 August

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 Tuesday 1 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 15:27 on Mon 31 Aug to 18:01 on Tue 1 Sep.

    2009-08-31T07:26:53Z → 2009-09-01T10:01:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 31st, 11:54–12:42 on the 1st.

    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 31st and 48 of 48 on the 1st.

    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 9881 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2009: Tuesday 1 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 2009 falls on Tuesday 1 September. Dvādaśī runs from 15:27 on Mon 31 Aug to 18:01 on Tue 1 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2009/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 1 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 1 Sep
compat-drikpanchangComparison profileTue 1 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 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles00:27 → 03:0112:2948 min12:290 min31 Aug
Chicago02:27 → 05:0112:2648 min12:260 min31 Aug
Jersey City03:27 → 06:0112:3248 min12:320 min31 Aug
Port of Spain03:27 → 06:0111:4248 min11:420 min31 Aug
London08:27 → 11:0112:3648 min12:360 min31 Aug
Durban09:27 → 12:0111:3248 min11:3229 min31 Aug
Dubai11:27 → 14:0111:5548 min11:5548 min31 Aug
Delhi12:57 → 15:3111:570 min11:5748 min1 Sep
Kolkata12:57 → 15:3111:130 min11:1248 min1 Sep
Singapore15:27 → 18:0112:410 min12:4148 min1 Sep
Sydney17:27 → 20:0111:320 min11:3148 min1 Sep
Suva19:27 → 22:0111:430 min11:4348 min1 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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