Ruling · Caitrī Pūrṇimā · 2011

Monday 18 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 70 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 Sunday 17 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

0 of 48 minutes covered

Midday of Monday 18 April

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

madhyāhna begins 11:54  12:42 madhyāhna ends
11:0611:3011:5412:1812:4213:0613:30

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 14:30 on Sun 17 Apr to 10:44 on Mon 18 Apr.

    2011-04-17T06:30:08Z → 2011-04-18T02:43:59Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 17th, 11:54–12:42 on the 18th.

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

  3. 03

    Rule

    Pūrṇimā 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: paraviddha → second-day · margin 4199 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 2011: Monday 18 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 2011 falls on Monday 18 April. Pūrṇimā runs from 14:30 on Sun 17 Apr to 10:44 on Mon 18 Apr, and reaches madhyāhna on neither day.

ahargana.org/baoding/festivals/2011/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 18 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 18 Apr
compat-drikpanchangComparison profileMon 18 Apr
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/chaitri-purnima · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 102

“S 15 Caitri purnima (paraviddha), Hanumat jayanti, Oli ending (Jain).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāMadhyāhna 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles23:30 → 19:4412:2948 min12:290 min17 Apr
Chicago01:30 → 21:4412:2748 min12:260 min17 Apr
Jersey City02:30 → 22:4412:3248 min12:320 min17 Apr
Port of Spain02:30 → 22:4411:4248 min11:420 min17 Apr
London07:30 → 03:4412:3748 min12:360 min17 Apr
Durban08:30 → 04:4411:3148 min11:310 min17 Apr
Dubai10:30 → 06:4411:5548 min11:540 min17 Apr
Delhi12:00 → 08:1411:5745 min11:570 min17 Apr
Kolkata12:00 → 08:1411:120 min11:120 min17 Apr
Singapore14:30 → 10:4412:400 min12:400 min18 Apr
Sydney16:30 → 12:4411:310 min11:3048 min18 Apr
Suva18:30 → 14:4411:420 min11:4248 min18 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
chaitri-purnima@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa