Ruling · Yama Dvitīyā (Bhai Dooj) · 2065

Saturday 31 October

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 Friday 30 October

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

0 of 48 minutes covered

Midday of Saturday 31 October

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
Dvitīyā ends 12:23:16
10:5011:1411:3812:0212:2612:5013:14

46 of 48 minutes covered, the first 46

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

How it was decided

  1. 01

    Aṅga

    Dvitīyā runs from 16:05 on Fri 30 Oct to 12:23 on Sat 31 Oct.

    2065-10-30T08:05:02Z → 2065-10-31T04:23:16Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 30th, 11:38–12:26 on the 31st.

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

  3. 03

    Rule

    Dvitīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 30th and 46 of 48 on the 31st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  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

    Yama Dvitīyā, Baoding, 2065: Saturday 31 October.

    confidence: boundary (margin)

Say it like this

In Baoding, Yama Dvitīyā (Bhai Dooj) 2065 falls on Saturday 31 October. Dvitīyā runs from 16:05 on Fri 30 Oct to 12:23 on Sat 31 Oct and covers 46 of 48 minutes of madhyāhna that midday. It is 2 min 21 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2065/yama-dvitiya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 31 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 31 Oct
compat-drikpanchangComparison profileSat 31 Oct
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/yama-dvitiya · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Dvitīyā
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 2 Bhratrdvitiya, Yamadvitiya (madhyahna, purvaviddha), Masyadhara (Dwat) puja (Bihar).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvitīyāMadhyāhna 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles01:05 → 21:2312:1248 min12:120 min30 Oct
Chicago03:05 → 23:2312:1048 min12:100 min30 Oct
Jersey City04:05 → 00:2312:1648 min12:160 min30 Oct
Port of Spain04:05 → 00:2311:2648 min11:260 min30 Oct
London08:05 → 04:2311:2048 min11:200 min30 Oct
Durban10:05 → 06:2311:1648 min11:160 min30 Oct
Dubai12:05 → 08:2311:3821 min11:380 min30 Oct
Delhi13:35 → 09:5311:410 min11:410 min31 Oct
Kolkata13:35 → 09:5310:560 min10:560 min31 Oct
Singapore16:05 → 12:2312:240 min12:240 min31 Oct
Sydney19:05 → 15:2312:150 min12:1548 min31 Oct
Suva20:05 → 16:2311:260 min11:2648 min31 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
yama-dvitiya@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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