Ruling · Rāma Navamī · 2019

Sunday 14 April

Boundaryin Daqing, under the Rashtriya Panchang method. A threshold is only 0 min 57 s away. Say “contested”.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

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 Saturday 13 April

Navamī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Sunday 14 April

Taken. The only midday Navamī reaches.

madhyāhna begins 11:17  12:05 madhyāhna ends
Navamī ends 12:05:51
10:2910:5311:1711:4112:0512:2912:53

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 14:12 on Sat 13 Apr to 12:06 on Sun 14 Apr.

    2019-04-13T06:11:44Z → 2019-04-14T04:05:51Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:17–12:05 on the 13th, 11:17–12:05 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 57 s < 300 s

  5. 05

    Ruling

    Rāma Navamī, Daqing, 2019: Sunday 14 April.

    confidence: boundary (margin)

Say it like this

In Daqing, Rāma Navamī 2019 falls on Sunday 14 April. Navamī runs from 14:12 on Sat 13 Apr to 12:06 on Sun 14 Apr and covers all of madhyāhna that midday. It is 0 min 57 s from a threshold: treat the date as contested.

ahargana.org/daqing/festivals/2019/rama-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 14 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 14 Apr
compat-drikpanchangComparison profileSun 14 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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles23:12 → 21:0612:3048 min12:300 min13 Apr
Chicago01:12 → 23:0612:2848 min12:270 min13 Apr
Jersey City02:12 → 00:0612:3348 min12:330 min13 Apr
Port of Spain02:12 → 00:0611:4348 min11:420 min13 Apr
London07:12 → 05:0612:3848 min12:370 min13 Apr
Durban08:12 → 06:0611:3248 min11:320 min13 Apr
Dubai10:12 → 08:0611:5648 min11:550 min13 Apr
Delhi11:42 → 09:3611:5848 min11:580 min13 Apr
Kolkata11:42 → 09:3611:1320 min11:130 min13 Apr
Singapore14:12 → 12:0612:410 min12:410 min14 Apr
Sydney16:12 → 14:0611:320 min11:3148 min14 Apr
Suva18:12 → 16:0611:430 min11:4348 min14 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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