Ruling · Vāmana Jayantī · 1986

Monday 15 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 310 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 14 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:50  12:38 madhyāhna ends
11:0211:2611:5012:1412:3813:0213:26

0 of 48 minutes covered

Midday of Monday 15 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

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 19:50 on Sun 14 Sep to 17:47 on Mon 15 Sep.

    1986-09-14T11:49:51Z → 1986-09-15T09:47:23Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 14th, 11:49–12:37 on the 15th.

    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 14th and 48 of 48 on the 15th.

    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 18609 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1986: Monday 15 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1986 falls on Monday 15 September. Dvādaśī runs from 19:50 on Sun 14 Sep to 17:47 on Mon 15 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1986/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 15 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 15 Sep
compat-drikpanchangComparison profileMon 15 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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles04:50 → 02:4712:2448 min12:240 min14 Sep
Chicago06:50 → 04:4712:2248 min12:210 min14 Sep
Jersey City07:50 → 05:4712:2848 min12:270 min14 Sep
Port of Spain07:50 → 05:4711:3848 min11:370 min14 Sep
London12:50 → 10:4712:3230 min12:310 min14 Sep
Durban13:50 → 11:4711:280 min11:2720 min15 Sep
Dubai15:50 → 13:4711:500 min11:5048 min15 Sep
Delhi17:20 → 15:1711:530 min11:5248 min15 Sep
Kolkata17:20 → 15:1711:080 min11:0848 min15 Sep
Singapore19:50 → 17:4712:360 min12:3648 min15 Sep
Sydney21:50 → 19:4711:270 min11:2748 min15 Sep
Suva23:50 → 21:4711:380 min11:3848 min15 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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