Ruling · Vāmana Jayantī · 2099

Friday 25 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 36 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 Friday 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

Midday of Saturday 26 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:46  12:34 madhyāhna ends
Dvādaśī ends 11:09:20
10:5811:2211:4612:1012:3412:5813:22

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 09:02 on Fri 25 Sep to 11:09 on Sat 26 Sep.

    2099-09-25T01:02:19Z → 2099-09-26T03:09:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 25th, 11:46–12:34 on the 26th.

    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 25th and 0 of 48 on the 26th.

    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 2174 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 2099: Friday 25 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 2099 falls on Friday 25 September. Dvādaśī runs from 09:02 on Fri 25 Sep to 11:09 on Sat 26 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2099/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 25 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 25 Sep
compat-drikpanchangComparison profileFri 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 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles18:02 → 20:0912:2148 min12:200 min25 Sep
Chicago20:02 → 22:0912:1848 min12:180 min25 Sep
Jersey City21:02 → 23:0912:2448 min12:240 min25 Sep
Port of Spain21:02 → 23:0911:3448 min11:340 min25 Sep
London02:02 → 04:0912:2848 min12:280 min25 Sep
Durban03:02 → 05:0911:2448 min11:240 min25 Sep
Dubai05:02 → 07:0911:4748 min11:460 min25 Sep
Delhi06:32 → 08:3911:4948 min11:490 min25 Sep
Kolkata06:32 → 08:3911:0448 min11:040 min25 Sep
Singapore09:02 → 11:0912:3348 min12:320 min25 Sep
Sydney11:02 → 13:0911:2448 min11:2348 min25 Sep
Suva13:02 → 15:0911:350 min11:3448 min26 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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