Ruling · Caitrī Pūrṇimā · 2017

Tuesday 11 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 9 min 09 s.

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 Monday 10 April

Pūrṇimā is absent from madhyāhna. Not taken.

madhyāhna begins 11:56  12:44 madhyāhna ends
Pūrṇimā begins 12:52:57
11:0811:3211:5612:2012:4413:0813:32

0 of 48 minutes covered

Midday of Tuesday 11 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 12:53 on Mon 10 Apr to 14:08 on Tue 11 Apr.

    2017-04-10T04:52:57Z → 2017-04-11T06:08:05Z

  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 0 of 48 minutes on the 10th and 48 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 549 s

  5. 05

    Ruling

    Caitrī Pūrṇimā, Baoding, 2017: Tuesday 11 April.

    confidence: determinate

Say it like this

In Baoding, Caitrī Pūrṇimā 2017 falls on Tuesday 11 April. Pūrṇimā runs from 12:53 on Mon 10 Apr to 14:08 on Tue 11 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2017/chaitri-purnima · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 11 Apr
Ahargaṇa, classicalDisc centre, no refractionTue 11 Apr
compat-drikpanchangComparison profileTue 11 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles21:53 → 23:0812:3048 min12:300 min10 Apr
Chicago23:53 → 01:0812:2848 min12:280 min10 Apr
Jersey City00:53 → 02:0812:3448 min12:340 min10 Apr
Port of Spain00:53 → 02:0811:4348 min11:430 min10 Apr
London05:53 → 07:0812:3848 min12:380 min10 Apr
Durban06:53 → 08:0811:3348 min11:330 min10 Apr
Dubai08:53 → 10:0811:5648 min11:560 min10 Apr
Delhi10:23 → 11:3811:5948 min11:580 min10 Apr
Kolkata10:23 → 11:3811:1448 min11:1424 min11 Apr
Singapore12:53 → 14:0812:4237 min12:4248 min11 Apr
Sydney14:53 → 16:0811:320 min11:3248 min11 Apr
Suva16:53 → 18:0811:440 min11:4348 min11 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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