Ruling · Rāma Navamī · 1951

Sunday 15 April

Boundaryin Daqing, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Sunday 15 April

Taken. Both middays qualify; the rule is silent, and this one is covered longer.

madhyāhna begins 11:17  12:05 madhyāhna ends
10:2910:5311:1711:4112:0512:2912:53

48 of 48 minutes covered

Midday of Monday 16 April

Qualifies with 9 of 48 minutes. Not taken.

madhyāhna begins 11:17  12:05 madhyāhna ends
Navamī ends 11:25:35
10:2910:5311:1711:4112:0512:2912:53

9 of 48 minutes covered, the first 9

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 09:54 on Sun 15 Apr to 11:26 on Mon 16 Apr.

    1951-04-15T01:53:46Z → 1951-04-16T03:25:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:17–12:05 on the 15th, 11:17–12:05 on the 16th.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 15th and 9 of 48 on the 16th.

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

  4. 04

    Tie-break

    Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 546 s

  5. 05

    Ruling

    Rāma Navamī, Daqing, 1951: Sunday 15 April.

    confidence: boundary (tie-break-unstated)

Say it like this

In Daqing, Rāma Navamī 1951 falls on Sunday 15 April. Navamī runs from 09:54 on Sun 15 Apr to 11:26 on Mon 16 Apr and covers all of madhyāhna that midday. It also reaches the next midday for 9 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/daqing/festivals/1951/rama-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 15 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 15 Apr
compat-drikpanchangComparison profileSun 15 Apr
No institution has a recorded ruling for Daqing.

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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles17:54 → 19:2611:2948 min11:290 min15 Apr
Chicago19:54 → 21:2611:2748 min11:270 min15 Apr
Jersey City20:54 → 22:2611:3348 min11:330 min15 Apr
Port of Spain21:54 → 23:2611:4248 min11:420 min15 Apr
London01:54 → 04:2612:3748 min12:370 min15 Apr
Durban03:54 → 05:2611:3248 min11:320 min15 Apr
Dubai05:54 → 07:2611:5548 min11:550 min15 Apr
Delhi07:24 → 08:5611:5848 min11:570 min15 Apr
Kolkata07:24 → 08:5611:1348 min11:130 min15 Apr
Singapore09:24 → 10:5612:1148 min12:110 min15 Apr
Sydney11:54 → 13:2611:3125 min11:3148 min16 Apr
Suva13:54 → 15:2611:430 min11:4248 min16 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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