Ruling · Bhīṣma Dvādaśī · 2027

Thursday 18 February

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 83 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Wednesday 17 February

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:17  13:05 madhyāhna ends
11:2911:5312:1712:4113:0513:2913:53

0 of 48 minutes covered

Midday of Thursday 18 February

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:17  13:05 madhyāhna ends
11:2911:5312:1712:4113:0513:2913:53

48 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 17:32 on Wed 17 Feb to 14:28 on Thu 18 Feb.

    2027-02-17T12:02:21Z → 2027-02-18T08:58:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:17–13:05 on the 17th, 12:17–13:05 on the 18th.

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

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 48 of 48 on the 18th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 4994 s

  5. 05

    Ruling

    Bhīṣma Dvādaśī, Ujjain, 2027: Thursday 18 February.

    confidence: determinate

Say it like this

In Ujjain, Bhīṣma Dvādaśī 2027 falls on Thursday 18 February. Dvādaśī runs from 17:32 on Wed 17 Feb to 14:28 on Thu 18 Feb and covers all of madhyāhna that midday.

ahargana.org/ujjain/festivals/2027/bhishma-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 18 Feb
Ahargaṇa, classicalDisc centre, no refractionThu 18 Feb
compat-drikpanchangComparison profileThu 18 Feb
No institution has a recorded ruling for Ujjain.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/bhishma-dvadashi · ruleset 2026.3-draft

Month
Māgha, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 105

“S 12 Bhisma dvadasi (purvaviddha), Amalaki dvadasi, Santana dvadasi, Varaha dvadasi” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles04:02 → 00:5811:4348 min11:430 min17 Feb
Chicago06:02 → 02:5811:4148 min11:410 min17 Feb
Jersey City07:02 → 03:5811:4748 min11:460 min17 Feb
Port of Spain08:02 → 04:5811:5648 min11:560 min17 Feb
London12:02 → 08:5811:5137 min11:510 min17 Feb
Durban14:02 → 10:5811:460 min11:460 min18 Feb
Dubai16:02 → 12:5812:090 min12:0948 min18 Feb
Delhi17:32 → 14:2812:110 min12:1148 min18 Feb
Kolkata17:32 → 14:2811:270 min11:2748 min18 Feb
Singapore20:02 → 16:5812:550 min12:5548 min18 Feb
Sydney23:02 → 19:5812:450 min12:4548 min18 Feb
Suva00:02 → 20:5811:560 min11:5648 min18 Feb
Profile · tradition
pac-rp@2026.1 · smarta
Rule
bhishma-dvadashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s