Ruling · Vāmana Jayantī · 1980

Sunday 21 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 217 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 Sunday 21 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

48 of 48 minutes covered

Midday of Monday 22 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

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 08:10 on Sun 21 Sep to 05:58 on Mon 22 Sep.

    1980-09-21T00:10:25Z → 1980-09-21T21:57:42Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 21st, 11:47–12:35 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    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 12991 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1980: Sunday 21 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1980 falls on Sunday 21 September. Dvādaśī runs from 08:10 on Sun 21 Sep to 05:58 on Mon 22 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1980/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 21 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 21 Sep
compat-drikpanchangComparison profileSun 21 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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles17:10 → 14:5812:2248 min12:210 min21 Sep
Chicago19:10 → 16:5812:1948 min12:190 min21 Sep
Jersey City20:10 → 17:5812:2548 min12:250 min21 Sep
Port of Spain20:10 → 17:5811:3548 min11:350 min21 Sep
London01:10 → 22:5812:2948 min12:290 min21 Sep
Durban02:10 → 23:5811:2548 min11:250 min21 Sep
Dubai04:10 → 01:5811:4848 min11:470 min21 Sep
Delhi05:40 → 03:2811:5048 min11:500 min21 Sep
Kolkata05:40 → 03:2811:0548 min11:050 min21 Sep
Singapore07:40 → 05:2812:0448 min12:030 min21 Sep
Sydney10:10 → 07:5811:2548 min11:240 min21 Sep
Suva12:10 → 09:5811:3613 min11:350 min21 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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