Ruling · Yama Dvitīyā (Bhai Dooj) · 1971

Thursday 21 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 354 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 Wednesday 20 October

Dvitīyā is absent from madhyāhna. Not taken.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

0 of 48 minutes covered

Midday of Thursday 21 October

Taken. The only midday Dvitīyā reaches.

madhyāhna begins 11:39  12:27 madhyāhna ends
10:5111:1511:3912:0312:2712:5113:15

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Dvitīyā runs from 18:21 on Wed 20 Oct to 20:33 on Thu 21 Oct.

    1971-10-20T10:21:17Z → 1971-10-21T12:32:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 20th, 11:39–12:27 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 21267 s

  5. 05

    Ruling

    Yama Dvitīyā, Baoding, 1971: Thursday 21 October.

    confidence: determinate

Say it like this

In Baoding, Yama Dvitīyā (Bhai Dooj) 1971 falls on Thursday 21 October. Dvitīyā runs from 18:21 on Wed 20 Oct to 20:33 on Thu 21 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1971/yama-dvitiya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 21 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 21 Oct
compat-drikpanchangComparison profileThu 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles03:21 → 05:3312:1448 min12:130 min20 Oct
Chicago05:21 → 07:3312:1148 min12:110 min20 Oct
Jersey City06:21 → 08:3312:1748 min12:170 min20 Oct
Port of Spain06:21 → 08:3311:2748 min11:270 min20 Oct
London11:21 → 13:3312:2148 min12:2148 min20 Oct
Durban12:21 → 14:3311:170 min11:1748 min21 Oct
Dubai14:21 → 16:3311:400 min11:3948 min21 Oct
Delhi15:51 → 18:0311:420 min11:4248 min21 Oct
Kolkata15:51 → 18:0310:570 min10:5748 min21 Oct
Singapore17:51 → 20:0311:560 min11:5548 min21 Oct
Sydney20:21 → 22:3311:160 min11:1648 min21 Oct
Suva22:21 → 00:3311:270 min11:2748 min21 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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