Ruling · Vāmana Jayantī · 1990

Saturday 1 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 35 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 Saturday 1 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:54  13:42 madhyāhna ends
12:0612:3012:5413:1813:4214:0614:30

48 of 48 minutes covered

Midday of Sunday 2 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:54  13:42 madhyāhna ends
Dvādaśī ends 12:18:27
12:0612:3012:5413:1813:4214:0614:30

0 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 11:29 on Sat 1 Sep to 12:18 on Sun 2 Sep.

    1990-09-01T02:29:26Z → 1990-09-02T03:18:28Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:54–13:42 on the 1st, 12:54–13:42 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 48 of 48 minutes on the 1st and 0 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 2113 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1990: Saturday 1 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1990 falls on Saturday 1 September. Dvādaśī runs from 11:29 on Sat 1 Sep to 12:18 on Sun 2 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1990/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 1 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 1 Sep
compat-drikpanchangComparison profileSat 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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles19:29 → 20:1812:2948 min12:280 min1 Sep
Chicago21:29 → 22:1812:2648 min12:260 min1 Sep
Jersey City22:29 → 23:1812:3248 min12:320 min1 Sep
Port of Spain22:29 → 23:1811:4248 min11:420 min1 Sep
London03:29 → 04:1812:3648 min12:360 min1 Sep
Durban04:29 → 05:1811:3248 min11:320 min1 Sep
Dubai06:29 → 07:1811:5548 min11:540 min1 Sep
Delhi07:59 → 08:4811:5748 min11:570 min1 Sep
Kolkata07:59 → 08:4811:1348 min11:120 min1 Sep
Singapore10:29 → 11:1812:4148 min12:400 min1 Sep
Sydney12:29 → 13:1811:320 min11:3148 min2 Sep
Suva14:29 → 15:1811:430 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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