Ruling · Anaṅga Trayodaśī · 1997

Sunday 20 April

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 600 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 Sunday 20 April

Taken. The only midday Trayodaśī reaches.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

48 of 48 minutes covered

Midday of Monday 21 April

Trayodaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:53  12:41 madhyāhna ends
11:0511:2911:5312:1712:4113:0513:29

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 23:51 on Sat 19 Apr to 01:54 on Mon 21 Apr.

    1997-04-19T15:50:38Z → 1997-04-20T17:53:35Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 20th, 11:53–12:41 on the 21st.

    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 20th and 0 of 48 on the 21st.

    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 35979 s

  5. 05

    Ruling

    Anaṅga Trayodaśī, Baoding, 1997: Sunday 20 April.

    confidence: determinate

Say it like this

In Baoding, Anaṅga Trayodaśī 1997 falls on Sunday 20 April. Trayodaśī runs from 23:51 on Sat 19 Apr to 01:54 on Mon 21 Apr and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1997/ananga-trayodashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 20 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 20 Apr
compat-drikpanchangComparison profileSun 20 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles08:51 → 10:5412:2848 min12:280 min19 Apr
Chicago10:51 → 12:5412:2648 min12:2628 min19 Apr
Jersey City11:51 → 13:5412:3248 min12:3248 min19 Apr
Port of Spain11:51 → 13:5411:4139 min11:4148 min19 Apr
London16:51 → 18:5412:360 min12:3648 min20 Apr
Durban17:51 → 19:5411:310 min11:3148 min20 Apr
Dubai19:51 → 21:5411:540 min11:5448 min20 Apr
Delhi21:21 → 23:2411:560 min11:5648 min20 Apr
Kolkata21:21 → 23:2411:120 min11:1248 min20 Apr
Singapore23:51 → 01:5412:400 min12:4048 min20 Apr
Sydney01:51 → 03:5411:300 min11:3048 min20 Apr
Suva03:51 → 05:5411:410 min11:4148 min20 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