Ruling · Anaṅga Trayodaśī · 1901

Monday 1 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 427 minutes.

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 1 April

Taken. The only midday Trayodaśī reaches.

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

48 of 48 minutes covered

Midday of Tuesday 2 April

Trayodaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

0 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 03:04 on Mon 1 Apr to 04:51 on Tue 2 Apr.

    1901-03-31T19:03:31Z → 1901-04-01T20:51:23Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 1st, 11:58–12:46 on the 2nd.

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

  3. 03

    Rule

    Trayodaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 1st and 0 of 48 on the 2nd.

    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 25620 s

  5. 05

    Ruling

    Anaṅga Trayodaśī, Baoding, 1901: Monday 1 April.

    confidence: determinate

Say it like this

In Baoding, Anaṅga Trayodaśī 1901 falls on Monday 1 April. Trayodaśī runs from 03:04 on Mon 1 Apr to 04:51 on Tue 2 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1901/ananga-trayodashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 1 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 1 Apr
compat-drikpanchangComparison profileMon 1 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 31stCoveredMadhyāhna 1stCoveredRuled
Los Angeles11:04 → 12:5111:3448 min11:3348 min31 Mar
Chicago13:04 → 14:5111:310 min11:3148 min1 Apr
Jersey City14:04 → 15:5111:370 min11:3748 min1 Apr
Port of Spain15:04 → 16:5111:470 min11:4648 min1 Apr
London19:04 → 20:5111:410 min11:4148 min1 Apr
Durban20:34 → 22:2111:060 min11:0648 min1 Apr
Dubai22:45 → 00:3211:400 min11:4048 min1 Apr
Delhi00:25 → 02:1211:530 min11:5248 min1 Apr
Kolkata00:25 → 02:1211:080 min11:0848 min1 Apr
Singapore01:59 → 03:4611:400 min11:4048 min1 Apr
Sydney05:04 → 06:5111:350 min11:3548 min1 Apr
Suva06:59 → 08:4611:420 min11:4148 min1 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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