Ruling · Vāmana Jayantī · 1918

Tuesday 17 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 141 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 17 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

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

Dvādaśī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 09:28 on Tue 17 Sep to 07:10 on Wed 18 Sep.

    1918-09-17T01:27:56Z → 1918-09-17T23:09:42Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 17th, 11:48–12:36 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 8443 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1918: Tuesday 17 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1918 falls on Tuesday 17 September. Dvādaśī runs from 09:28 on Tue 17 Sep to 07:10 on Wed 18 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1918/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 17 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 17 Sep
compat-drikpanchangComparison profileTue 17 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles18:28 → 16:1012:2348 min12:230 min17 Sep
Chicago20:28 → 18:1012:2148 min12:210 min17 Sep
Jersey City21:28 → 19:1012:2748 min12:260 min17 Sep
Port of Spain21:28 → 19:1011:3748 min11:360 min17 Sep
London02:28 → 00:1012:3148 min12:300 min17 Sep
Durban03:28 → 01:1011:2748 min11:270 min17 Sep
Dubai05:09 → 02:5111:3048 min11:300 min17 Sep
Delhi06:58 → 04:4011:5248 min11:510 min17 Sep
Kolkata06:58 → 04:4011:0748 min11:070 min17 Sep
Singapore08:28 → 06:1011:3548 min11:350 min17 Sep
Sydney11:28 → 09:1011:2646 min11:260 min17 Sep
Suva13:28 → 11:1011:370 min11:370 min18 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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