Ruling · Vāmana Jayantī · 1907

Thursday 19 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 21 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 Wednesday 18 September

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

0 of 48 minutes covered

Midday of Thursday 19 September

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
Dvādaśī ends 12:56:45
11:0011:2411:4812:1212:3613:0013:24

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 15:35 on Wed 18 Sep to 12:57 on Thu 19 Sep.

    1907-09-18T07:34:49Z → 1907-09-19T04:56:45Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 18th, 11:48–12:36 on the 19th.

    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 18th and 48 of 48 on the 19th.

    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 1242 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1907: Thursday 19 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1907 falls on Thursday 19 September. Dvādaśī runs from 15:35 on Wed 18 Sep to 12:57 on Thu 19 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1907/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 19 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 19 Sep
compat-drikpanchangComparison profileThu 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles23:35 → 20:5711:2348 min11:230 min18 Sep
Chicago01:35 → 22:5711:2148 min11:200 min18 Sep
Jersey City02:35 → 23:5711:2648 min11:260 min18 Sep
Port of Spain03:35 → 00:5711:3648 min11:360 min18 Sep
London07:35 → 04:5711:3048 min11:300 min18 Sep
Durban09:35 → 06:5711:2748 min11:260 min18 Sep
Dubai11:16 → 08:3811:3048 min11:300 min18 Sep
Delhi13:05 → 10:2711:510 min11:510 min19 Sep
Kolkata13:05 → 10:2711:070 min11:070 min19 Sep
Singapore14:35 → 11:5711:350 min11:3522 min19 Sep
Sydney17:35 → 14:5711:260 min11:2648 min19 Sep
Suva19:30 → 16:5211:320 min11:3248 min19 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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