Ruling · Vāmana Jayantī · 1901

Wednesday 25 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 534 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 Tuesday 24 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:46  12:34 madhyāhna ends
10:5811:2211:4612:1012:3412:5813:22

0 of 48 minutes covered

Midday of Wednesday 25 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:46  12:34 madhyāhna ends
10:5811:2211:4612:1012:3412:5813:22

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 22:54 on Tue 24 Sep to 21:28 on Wed 25 Sep.

    1901-09-24T14:54:27Z → 1901-09-25T13:28:10Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 24th, 11:46–12:34 on the 25th.

    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 24th and 48 of 48 on the 25th.

    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 32063 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1901: Wednesday 25 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1901 falls on Wednesday 25 September. Dvādaśī runs from 22:54 on Tue 24 Sep to 21:28 on Wed 25 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1901/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 25 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 25 Sep
compat-drikpanchangComparison profileWed 25 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 24thCoveredMadhyāhna 25thCoveredRuled
Los Angeles06:54 → 05:2811:2148 min11:200 min24 Sep
Chicago08:54 → 07:2811:1848 min11:180 min24 Sep
Jersey City09:54 → 08:2811:2448 min11:240 min24 Sep
Port of Spain10:54 → 09:2811:3448 min11:340 min24 Sep
London14:54 → 13:2811:280 min11:2848 min25 Sep
Durban16:24 → 14:5810:540 min10:5448 min25 Sep
Dubai18:35 → 17:0911:280 min11:2748 min25 Sep
Delhi20:15 → 18:4911:400 min11:4048 min25 Sep
Kolkata20:15 → 18:4910:560 min10:5548 min25 Sep
Singapore21:49 → 20:2311:280 min11:2848 min25 Sep
Sydney00:54 → 23:2811:240 min11:2348 min25 Sep
Suva02:49 → 01:2311:300 min11:2948 min25 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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