Ruling · Caitrī Pūrṇimā · 1913

Sunday 20 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 213 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 20 April

Taken. The only midday Pūrṇimā reaches.

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

48 of 48 minutes covered

Midday of Monday 21 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

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 08:21 on Sun 20 Apr to 05:32 on Mon 21 Apr.

    1913-04-20T00:20:39Z → 1913-04-20T21:32:23Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 20th, 11:53–12:41 on the 21st.

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

  3. 03

    Rule

    Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 20th and 0 of 48 on the 21st.

    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: paraviddha → only-day · margin 12774 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1913: Sunday 20 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1913 falls on Sunday 20 April. Pūrṇimā runs from 08:21 on Sun 20 Apr to 05:32 on Mon 21 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1913/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 20 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 20 Apr
compat-drikpanchangComparison profileSun 20 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles16:21 → 13:3211:2848 min11:280 min20 Apr
Chicago18:21 → 15:3211:2648 min11:260 min20 Apr
Jersey City19:21 → 16:3211:3248 min11:310 min20 Apr
Port of Spain20:21 → 17:3211:4148 min11:410 min20 Apr
London00:21 → 21:3211:3648 min11:360 min20 Apr
Durban02:21 → 23:3211:3148 min11:300 min20 Apr
Dubai04:02 → 01:1311:3548 min11:350 min20 Apr
Delhi05:51 → 03:0211:5648 min11:560 min20 Apr
Kolkata05:51 → 03:0211:1248 min11:120 min20 Apr
Singapore07:21 → 04:3211:4048 min11:390 min20 Apr
Sydney10:21 → 07:3211:3048 min11:300 min20 Apr
Suva12:16 → 09:2711:369 min11:360 min20 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

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