Ruling · Anaṅga Trayodaśī · 2011

Saturday 16 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 335 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 Friday 15 April

Trayodaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:55  12:43 madhyāhna ends
11:0711:3111:5512:1912:4313:0713:31

0 of 48 minutes covered

Midday of Saturday 16 April

Taken. The only midday Trayodaśī reaches.

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

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Trayodaśī runs from 21:54 on Fri 15 Apr to 18:17 on Sat 16 Apr.

    2011-04-15T13:54:15Z → 2011-04-16T10:17:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 15th, 11:54–12:42 on the 16th.

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

  3. 03

    Rule

    Trayodaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 15th and 48 of 48 on the 16th.

    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: purvaviddha → only-day · margin 20085 s

  5. 05

    Ruling

    Anaṅga Trayodaśī, Baoding, 2011: Saturday 16 April.

    confidence: determinate

Say it like this

In Baoding, Anaṅga Trayodaśī 2011 falls on Saturday 16 April. Trayodaśī runs from 21:54 on Fri 15 Apr to 18:17 on Sat 16 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2011/ananga-trayodashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 16 Apr
Ahargaṇa, classicalDisc centre, no refractionSat 16 Apr
compat-drikpanchangComparison profileSat 16 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/ananga-trayodashi · ruleset 2026.3-draft

Month
Caitra, amānta
Pakṣa · aṅga
Śukla · Trayodaśī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 102

“S 13 Ananga trayodasi (purvaviddha), Mahavira jayanti (Jain).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceTrayodaśīMadhyāhna 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles06:54 → 03:1712:2948 min12:290 min15 Apr
Chicago08:54 → 05:1712:2748 min12:270 min15 Apr
Jersey City09:54 → 06:1712:3348 min12:330 min15 Apr
Port of Spain09:54 → 06:1711:4248 min11:420 min15 Apr
London14:54 → 11:1712:370 min12:370 min16 Apr
Durban15:54 → 12:1711:320 min11:3246 min16 Apr
Dubai17:54 → 14:1711:550 min11:5548 min16 Apr
Delhi19:24 → 15:4711:570 min11:5748 min16 Apr
Kolkata19:24 → 15:4711:130 min11:1348 min16 Apr
Singapore21:54 → 18:1712:410 min12:4148 min16 Apr
Sydney23:54 → 20:1711:310 min11:3148 min16 Apr
Suva01:54 → 22:1711:420 min11:4248 min16 Apr
Profile · tradition
pac-rp@2026.1 · smarta
Rule
ananga-trayodashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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