Ruling · Śivarātri (Masik Shivaratri) · 2026

Sunday 12 July

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 98 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 Sunday 12 July

Taken. The only night Caturdaśī reaches.

niśītha begins 00:09  00:57 niśītha ends
23:2123:4500:0900:3300:5701:2101:45

48 of 48 minutes covered

Night of Monday 13 July

Caturdaśī is absent from niśītha. Not taken.

niśītha begins 00:09  00:57 niśītha ends
23:2123:4500:0900:3300:5701:2101:45

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 22:30 on Sun 12 Jul to 18:50 on Mon 13 Jul.

    2026-07-12T17:00:27Z → 2026-07-13T13:20:00Z

  2. 02

    Kāla

    Niśītha is 1 ghaṭikā either side of midnight: 00:09–00:57 on the 12th, 00:09–00:57 on the 13th.

    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 12th and 0 of 48 on the 13th.

    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 5893 s

  5. 05

    Ruling

    Śivarātri, Ujjain, 2026: Sunday 12 July.

    confidence: determinate

Say it like this

In Ujjain, Śivarātri (Masik Shivaratri) 2026 falls on Sunday 12 July. Caturdaśī runs from 22:30 on Sun 12 Jul to 18:50 on Mon 13 Jul and covers all of niśītha that night.

ahargana.org/ujjain/festivals/2026/shivaratri?on=2026-07-12 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 12 Jul
Ahargaṇa, classicalDisc centre, no refractionSun 12 Jul
compat-drikpanchangComparison profileSun 12 Jul
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 12thCoveredNiśītha 13thCoveredRuled
Los Angeles10:00 → 06:2000:3548 min00:350 min12 Jul
Chicago12:00 → 08:2000:3248 min00:330 min12 Jul
Jersey City13:00 → 09:2000:3848 min00:380 min12 Jul
Port of Spain13:00 → 09:2023:4848 min23:480 min12 Jul
London18:00 → 14:2000:4248 min00:430 min12 Jul
Durban19:00 → 15:2023:3748 min23:380 min12 Jul
Dubai21:00 → 17:2000:0148 min00:010 min12 Jul
Delhi22:30 → 18:5000:0348 min00:030 min12 Jul
Kolkata22:30 → 18:5023:1848 min23:180 min12 Jul
Singapore01:00 → 21:2000:4634 min00:460 min12 Jul
Sydney03:00 → 23:2023:370 min23:370 min12 Jul
Suva05:00 → 01:2023:480 min23:4848 min13 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shivaratri@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s