Ruling · Vāmana Jayantī · 1978

Thursday 14 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 12 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 13 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 Thursday 14 September

Taken. Dvādaśī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:50  12:38 madhyāhna ends
Dvādaśī ends 11:37:47
11:0211:2611:5012:1412:3813:0213:26

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 14:38 on Wed 13 Sep to 11:38 on Thu 14 Sep.

    1978-09-13T06:37:45Z → 1978-09-14T03:37:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 13th, 11:50–12:38 on the 14th.

    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 13th and 0 of 48 on the 14th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: unstated → second-day · margin 709 s

  5. 05

    Ruling

    Vāmana Jayantī, Baoding, 1978: Thursday 14 September.

    confidence: determinate

Say it like this

In Baoding, Vāmana Jayantī 1978 falls on Thursday 14 September. Dvādaśī runs from 14:38 on Wed 13 Sep to 11:38 on Thu 14 Sep, and reaches madhyāhna on neither day.

ahargana.org/baoding/festivals/1978/vamana-jayanti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 14 Sep
Ahargaṇa, classicalDisc centre, no refractionThu 14 Sep
compat-drikpanchangComparison profileThu 14 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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles23:38 → 20:3812:2548 min12:240 min13 Sep
Chicago01:38 → 22:3812:2248 min12:220 min13 Sep
Jersey City02:38 → 23:3812:2848 min12:280 min13 Sep
Port of Spain02:38 → 23:3811:3848 min11:380 min13 Sep
London07:38 → 04:3812:3248 min12:320 min13 Sep
Durban08:38 → 05:3811:2848 min11:280 min13 Sep
Dubai10:38 → 07:3811:5148 min11:500 min13 Sep
Delhi12:08 → 09:0811:5333 min11:530 min13 Sep
Kolkata12:08 → 09:0811:080 min11:080 min14 Sep
Singapore14:08 → 11:0812:070 min12:060 min14 Sep
Sydney16:38 → 13:3811:280 min11:2748 min14 Sep
Suva18:38 → 15:3811:390 min11:3848 min14 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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