Ruling · Rāma Navamī · 1908

Friday 10 April

Determinatein Datong, under the Rashtriya Panchang method. Clear of every threshold by 53 minutes.

Decide it for

DatongDelhiKolkataSingaporeSydneyJersey City

40°06′ N 113°17′ E · Asia/Shanghai · GeoNames 2037799

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Thursday 9 April

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:05  12:53 madhyāhna ends
11:1711:4112:0512:2912:5313:1713:41

0 of 48 minutes covered

Midday of Friday 10 April

Taken. The only midday Navamī reaches.

madhyāhna begins 12:05  12:53 madhyāhna ends
11:1711:4112:0512:2912:5313:1713:41

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 13:46 on Thu 9 Apr to 16:21 on Fri 10 Apr.

    1908-04-09T05:45:44Z → 1908-04-10T08:21:23Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 9th, 12:05–12:53 on the 10th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 3167 s

  5. 05

    Ruling

    Rāma Navamī, Datong, 1908: Friday 10 April.

    confidence: determinate

Say it like this

In Datong, Rāma Navamī 1908 falls on Friday 10 April. Navamī runs from 13:46 on Thu 9 Apr to 16:21 on Fri 10 Apr and covers all of madhyāhna that midday.

ahargana.org/datong/festivals/1908/rama-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 10 Apr
Ahargaṇa, classicalDisc centre, no refractionFri 10 Apr
compat-drikpanchangComparison profileFri 10 Apr
No institution has a recorded ruling for Datong.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/rama-navami · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Navamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 9 Ramanavami (madhyahnavyapini, special with Punarvasu naks.), Rama jayanti.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102. The row calls the day special when it falls with Punarvasu nakṣatra; the nakṣatra is not tested.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles21:46 → 00:2111:3148 min11:310 min9 Apr
Chicago23:46 → 02:2111:2948 min11:280 min9 Apr
Jersey City00:46 → 03:2111:3448 min11:340 min9 Apr
Port of Spain01:46 → 04:2111:4448 min11:440 min9 Apr
London05:46 → 08:2111:3948 min11:380 min9 Apr
Durban07:46 → 10:2111:3348 min11:330 min9 Apr
Dubai09:27 → 12:0211:3848 min11:3725 min9 Apr
Delhi11:16 → 13:5111:5948 min11:5948 min9 Apr
Kolkata11:16 → 13:5111:1447 min11:1448 min10 Apr
Singapore12:46 → 15:2111:420 min11:4248 min10 Apr
Sydney15:46 → 18:2111:330 min11:3248 min10 Apr
Suva17:41 → 20:1611:390 min11:3948 min10 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rama-navami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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