Ruling · Rāma Navamī · 2081

Friday 18 April

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 30 minutes.

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 Thursday 17 April

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:16  12:04 madhyāhna ends
Navamī begins 12:34:09
10:2810:5211:1611:4012:0412:2812:52

0 of 48 minutes covered

Midday of Friday 18 April

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

madhyāhna begins 11:16  12:04 madhyāhna ends
10:2810:5211:1611:4012:0412:2812:52

0 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 12:34 on Thu 17 Apr to 10:23 on Fri 18 Apr.

    2081-04-17T04:34:10Z → 2081-04-18T02:23:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:16–12:04 on the 17th, 11:16–12:04 on the 18th.

    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 17th and 0 of 48 on the 18th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: unstated → second-day · margin 1798 s

  5. 05

    Ruling

    Rāma Navamī, Daqing, 2081: Friday 18 April.

    confidence: determinate

Say it like this

In Daqing, Rāma Navamī 2081 falls on Friday 18 April. Navamī runs from 12:34 on Thu 17 Apr to 10:23 on Fri 18 Apr, and reaches madhyāhna on neither day.

ahargana.org/daqing/festivals/2081/rama-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Apr
Ahargaṇa, classicalDisc centre, no refractionFri 18 Apr
compat-drikpanchangComparison profileThu 17 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles21:34 → 19:2312:2948 min12:290 min17 Apr
Chicago23:34 → 21:2312:2748 min12:260 min17 Apr
Jersey City00:34 → 22:2312:3248 min12:320 min17 Apr
Port of Spain00:34 → 22:2311:4248 min11:420 min17 Apr
London05:34 → 03:2312:3748 min12:370 min17 Apr
Durban06:34 → 04:2311:3148 min11:310 min17 Apr
Dubai08:34 → 06:2311:5548 min11:540 min17 Apr
Delhi10:04 → 07:5311:5748 min11:570 min17 Apr
Kolkata10:04 → 07:5311:1248 min11:120 min17 Apr
Singapore12:34 → 10:2312:4048 min12:400 min17 Apr
Sydney14:34 → 12:2311:310 min11:3048 min18 Apr
Suva16:34 → 14:2311:420 min11:4248 min18 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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