Ruling · Caitrī Pūrṇimā · 1980

Monday 31 March

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 474 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 30 March

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

0 of 48 minutes covered

Midday of Monday 31 March

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

48 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 20:41 on Sun 30 Mar to 23:14 on Mon 31 Mar.

    1980-03-30T12:40:43Z → 1980-03-31T15:13:51Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 30th, 11:59–12:47 on the 31st.

    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 30th and 48 of 48 on the 31st.

    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 28424 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1980: Monday 31 March.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1980 falls on Monday 31 March. Pūrṇimā runs from 20:41 on Sun 30 Mar to 23:14 on Mon 31 Mar and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1980/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 31 Mar
Ahargaṇa, classicalDisc centre, no refractionMon 31 Mar
compat-drikpanchangComparison profileMon 31 Mar
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 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles04:41 → 07:1411:3448 min11:330 min30 Mar
Chicago06:41 → 09:1411:3148 min11:310 min30 Mar
Jersey City07:41 → 10:1411:3748 min11:370 min30 Mar
Port of Spain08:41 → 11:1411:4748 min11:460 min30 Mar
London13:41 → 16:1412:410 min12:4148 min31 Mar
Durban14:41 → 17:1411:360 min11:3648 min31 Mar
Dubai16:41 → 19:1411:590 min11:5948 min31 Mar
Delhi18:11 → 20:4412:020 min12:0148 min31 Mar
Kolkata18:11 → 20:4411:170 min11:1748 min31 Mar
Singapore20:11 → 22:4412:150 min12:1548 min31 Mar
Sydney22:41 → 01:1411:350 min11:3548 min31 Mar
Suva00:41 → 03:1411:470 min11:4648 min31 Mar
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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