Ruling · Anaṅga Trayodaśī · 1981

Thursday 16 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 14 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 Thursday 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

Midday of Friday 17 April

Trayodaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:54  12:42 madhyāhna ends
Trayodaśī ends 11:40:24
11:0611:3011:5412:1812:4213:0613:30

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 09:52 on Thu 16 Apr to 11:40 on Fri 17 Apr.

    1981-04-16T01:51:33Z → 1981-04-17T03:40:25Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 16th, 11:54–12:42 on the 17th.

    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 16th and 0 of 48 on the 17th.

    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 823 s

  5. 05

    Ruling

    Anaṅga Trayodaśī, Baoding, 1981: Thursday 16 April.

    confidence: determinate

Say it like this

In Baoding, Anaṅga Trayodaśī 1981 falls on Thursday 16 April. Trayodaśī runs from 09:52 on Thu 16 Apr to 11:40 on Fri 17 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1981/ananga-trayodashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 16 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 16 Apr
compat-drikpanchangComparison profileThu 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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles17:52 → 19:4011:2948 min11:290 min16 Apr
Chicago19:52 → 21:4011:2748 min11:260 min16 Apr
Jersey City20:52 → 22:4011:3248 min11:320 min16 Apr
Port of Spain21:52 → 23:4011:4248 min11:420 min16 Apr
London02:52 → 04:4012:3748 min12:370 min16 Apr
Durban03:52 → 05:4011:3248 min11:310 min16 Apr
Dubai05:52 → 07:4011:5548 min11:550 min16 Apr
Delhi07:22 → 09:1011:5748 min11:570 min16 Apr
Kolkata07:22 → 09:1011:1348 min11:120 min16 Apr
Singapore09:22 → 11:1012:1048 min12:100 min16 Apr
Sydney11:52 → 13:4011:3127 min11:3148 min16 Apr
Suva13:52 → 15:4011:420 min11:4248 min17 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