Ruling · Caitrī Pūrṇimā · 1971

Saturday 10 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 466 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 Saturday 10 April

Taken. The only midday Pūrṇimā reaches.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

48 of 48 minutes covered

Midday of Sunday 11 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
11:0811:3211:5612:2012:4413:0813:32

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 01:54 on Sat 10 Apr to 04:10 on Sun 11 Apr.

    1971-04-09T17:54:13Z → 1971-04-10T20:09:57Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 10th, 11:56–12:44 on the 11th.

    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 10th and 0 of 48 on the 11th.

    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 27951 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 1971: Saturday 10 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 1971 falls on Saturday 10 April. Pūrṇimā runs from 01:54 on Sat 10 Apr to 04:10 on Sun 11 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1971/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 10 Apr
Ahargaṇa, classicalDisc centre, no refractionSat 10 Apr
compat-drikpanchangComparison profileSat 10 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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles09:54 → 12:1011:3148 min11:3139 min10 Apr
Chicago11:54 → 14:1011:2922 min11:2848 min10 Apr
Jersey City12:54 → 15:1011:340 min11:3448 min10 Apr
Port of Spain13:54 → 16:1011:440 min11:4448 min10 Apr
London18:54 → 21:1012:390 min12:3948 min10 Apr
Durban19:54 → 22:1011:330 min11:3348 min10 Apr
Dubai21:54 → 00:1011:570 min11:5648 min10 Apr
Delhi23:24 → 01:4011:590 min11:5948 min10 Apr
Kolkata23:24 → 01:4011:150 min11:1448 min10 Apr
Singapore01:24 → 03:4012:120 min12:1248 min10 Apr
Sydney03:54 → 06:1011:330 min11:3348 min10 Apr
Suva05:54 → 08:1011:440 min11:4448 min10 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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