Ruling · Anaṅga Trayodaśī · 1925

Tuesday 7 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 21 s away. Say “contested”.

Decide it for

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 6 April

Trayodaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:57  12:45 madhyāhna ends
Trayodaśī begins 12:47:30
11:0911:3311:5712:2112:4513:0913:33

0 of 48 minutes covered

Midday of Tuesday 7 April

Taken. The only midday Trayodaśī reaches.

madhyāhna begins 11:57  12:45 madhyāhna ends
Trayodaśī ends 13:02:39
11:0911:3311:5712:2112:4513:0913:33

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 12:48 on Mon 6 Apr to 13:03 on Tue 7 Apr.

    1925-04-06T04:47:30Z → 1925-04-07T05:02:39Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 6th, 11:57–12:45 on the 7th.

    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 6th and 48 of 48 on the 7th.

    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 141 s < 300 s

  5. 05

    Ruling

    Anaṅga Trayodaśī, Baoding, 1925: Tuesday 7 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Anaṅga Trayodaśī 1925 falls on Tuesday 7 April. Trayodaśī runs from 12:48 on Mon 6 Apr to 13:03 on Tue 7 Apr and covers all of madhyāhna that midday. It is 2 min 21 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1925/ananga-trayodashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 7 Apr
Ahargaṇa, classicalDisc centre, no refractionTue 7 Apr
compat-drikpanchangComparison profileMon 6 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 6thCoveredMadhyāhna 7thCoveredRuled
Los Angeles20:48 → 21:0311:3248 min11:310 min6 Apr
Chicago22:48 → 23:0311:2948 min11:290 min6 Apr
Jersey City23:48 → 00:0311:3548 min11:350 min6 Apr
Port of Spain00:48 → 01:0311:4548 min11:440 min6 Apr
London04:48 → 05:0311:4048 min11:390 min6 Apr
Durban06:48 → 07:0311:3448 min11:340 min6 Apr
Dubai08:48 → 09:0311:5848 min11:570 min6 Apr
Delhi10:18 → 10:3312:0048 min12:000 min6 Apr
Kolkata10:18 → 10:3311:1548 min11:150 min6 Apr
Singapore11:48 → 12:0311:4344 min11:4320 min6 Apr
Sydney14:48 → 15:0311:340 min11:3348 min7 Apr
Suva16:48 → 17:0311:450 min11:4548 min7 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

About Ahargaṇa