Ruling · Śivarātri (Masik Shivaratri) · 2026

Thursday 8 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 94 minutes.

Decide it for

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

The two nights

One ghaṭī is 24 minutes. Niśītha is 1 ghaṭikā either side of midnight.

Night of Thursday 8 October

Taken. The only night Caturdaśī reaches.

niśītha begins 23:51  00:39 niśītha ends
23:0323:2723:5100:1500:3901:0301:27

48 of 48 minutes covered

Night of Friday 9 October

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 23:50  00:38 niśītha ends
23:0223:2623:5000:1400:3801:0201:26

0 of 48 minutes covered

Caturdaśī presentNiśītha, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 22:16 on Thu 8 Oct to 21:36 on Fri 9 Oct.

    2026-10-08T16:46:29Z → 2026-10-09T16:06:18Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 23:51–00:39 on the 8th, 23:50–00:38 on the 9th.

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

  3. 03

    Rule

    Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 8th and 0 of 48 on the 9th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108

  4. 04

    Tie-break

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

    priority: unstated → only-day · margin 5642 s

  5. 05

    Ruling

    Śivarātri, Ujjain, 2026: Thursday 8 October.

    confidence: determinate

Say it like this

In Ujjain, Śivarātri (Masik Shivaratri) 2026 falls on Thursday 8 October. Caturdaśī runs from 22:16 on Thu 8 Oct to 21:36 on Fri 9 Oct and covers all of niśītha that night.

ahargana.org/ujjain/festivals/2026/shivaratri?on=2026-10-08 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 8 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 8 Oct
compat-drikpanchangComparison profileThu 8 Oct
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/shivaratri · ruleset 2026.3-draft

Month
Every lunation
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Niśītha
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 108

“The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108. The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīNiśītha 8thCoveredNiśītha 9thCoveredRuled
Los Angeles09:46 → 09:0600:1748 min00:160 min8 Oct
Chicago11:46 → 11:0600:1448 min00:140 min8 Oct
Jersey City12:46 → 12:0600:2048 min00:200 min8 Oct
Port of Spain12:46 → 12:0623:3048 min23:290 min8 Oct
London17:46 → 17:0600:2448 min00:240 min8 Oct
Durban18:46 → 18:0623:1948 min23:190 min8 Oct
Dubai20:46 → 20:0623:4248 min23:420 min8 Oct
Delhi22:16 → 21:3623:4548 min23:440 min8 Oct
Kolkata22:16 → 21:3623:0048 min23:000 min8 Oct
Singapore00:46 → 00:0600:2830 min00:280 min8 Oct
Sydney03:46 → 03:0600:180 min00:1848 min9 Oct
Suva04:46 → 04:0623:300 min23:2948 min9 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shivaratri@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s