Accuracy check: this site's calculations against published references
Every day the engine recomputes a fixed set of reference values — festival dates from Government of India holiday lists, sunrise, sunset and Moon phases from the US Naval Observatory, ayanamsa from the Swiss Ephemeris — and compares its own results with them. This page shows the latest run as it is, unedited.
Last check 15 November 2026 at 3:45 am: 69 of 69 reference values within tolerance. 30 of the last 30 daily runs passed in full.
Largest time deviation in this run: 0.50 min.
Reference sources
51 reference values, dataset version 2. Each value names the public document or table it comes from.
- US Naval Observatory — 16 values
- US Naval Observatory Moon phases — 6 values
- Government of India — 25 values
- Swiss Ephemeris true Lahiri ayanamsa — 4 values
Latest results
| Reference | Kind | Result | Published value | This site | Deviation | Tolerance |
|---|---|---|---|---|---|---|
bengaluru-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=12.9716,77.5946&tz=5.5 |
Sunrise | ✓ Pass | 2026-02-14T06:43 | 2026-02-14T06:42:30 | -0.50 min | ± 1.5 min |
bengaluru-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=12.9716,77.5946&tz=5.5 |
Sunset | ✓ Pass | 2026-02-14T18:25 | 2026-02-14T18:25:08 | +0.15 min | ± 1.5 min |
chennai-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=13.0878,80.2785&tz=5.5 |
Sunrise | ✓ Pass | 2026-02-14T06:32 | 2026-02-14T06:31:52 | -0.12 min | ± 1.5 min |
chennai-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=13.0878,80.2785&tz=5.5 |
Sunset | ✓ Pass | 2026-02-14T18:14 | 2026-02-14T18:14:18 | +0.30 min | ± 1.5 min |
dopt-2026-bhai_doojGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Bhai Duj): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-11-11 | 2026-11-11 | 0.00 days | ± 0 days |
dopt-2026-buddha_purnimaGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Budha Purnima): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-05-01 | 2026-05-01 | 0.00 days | ± 0 days |
dopt-2026-chhath_pujaGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Pratihar Shashthi or Surya Shashthi (Chhat Puja)): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-11-15 | 2026-11-15 | 0.00 days | ± 0 days |
dopt-2026-diwaliGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Diwali (Deepavali)): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-11-08 | 2026-11-08 | 0.00 days | ± 0 days |
dopt-2026-durga_ashtamiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Dussehra (Mahashtami)): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-10-19 | 2026-10-19 | 0.00 days | ± 0 days |
dopt-2026-dussehraGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Dussehra): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-10-20 | 2026-10-20 | 0.00 days | ± 0 days |
dopt-2026-ganesh_chaturthiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Ganesh Chaturthi /Vinayak Chaturthi): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-09-14 | 2026-09-14 | 0.00 days | ± 0 days |
dopt-2026-gudi_padwaGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Chaitra Sukladi /Gudi Padava/Ugadi/ Cheti Chand): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-03-19 | 2026-03-19 | 0.00 days | ± 0 days |
dopt-2026-holiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Holi): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-03-04 | 2026-03-04 | 0.00 days | ± 0 days |
dopt-2026-holika_dahanGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Holika dahan): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-03-03 | 2026-03-03 | 0.00 days | ± 0 days |
dopt-2026-karva_chauthGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Karaka Chaturthi (Karwa Chouth)): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-10-29 | 2026-10-29 | 0.00 days | ± 0 days |
dopt-2026-krishna_janmashtamiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Janmashtami (Vaishnva)): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-09-04 | 2026-09-04 | 0.00 days | ± 0 days |
dopt-2026-maha_shivaratriGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Maha Shivratri): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-02-15 | 2026-02-15 | 0.00 days | ± 0 days |
dopt-2026-mahavir_jayantiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Mahavir Jayanti): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-03-31 | 2026-03-31 | 0.00 days | ± 0 days |
dopt-2026-makar_sankrantiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Makar Sankranti): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-01-14 | 2026-01-14 | 0.00 days | ± 0 days |
dopt-2026-mesha_sankrantiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Vaisakhi /Visu/ Meshadi (Tamil New Year's Day)): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-04-14 | 2026-04-14 | 0.00 days | ± 0 days |
dopt-2026-naraka_chaturdashiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Naraka Chaturdasi): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-11-08 | 2026-11-08 | 0.00 days | ± 0 days |
dopt-2026-onamGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Onam or Thiru Onam Day): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-08-26 | 2026-08-26 | 0.00 days | ± 0 days |
dopt-2026-pongalGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Magha Bihu / Pongal): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-01-14 | 2026-01-14 | 0.00 days | ± 0 days |
dopt-2026-raksha_bandhanGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Raksha Bandhan): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-08-28 | 2026-08-28 | 0.00 days | ± 0 days |
dopt-2026-ram_navamiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (closed holidays, Ram Navami): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-03-26 | 2026-03-26 | 0.00 days | ± 0 days |
dopt-2026-rath_yatraGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Rath Yatra): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-07-16 | 2026-07-16 | 0.00 days | ± 0 days |
dopt-2026-ugadiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Chaitra Sukladi /Gudi Padava/Ugadi/ Cheti Chand): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-03-19 | 2026-03-19 | 0.00 days | ± 0 days |
dopt-2026-valmiki_jayantiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Maharishi Valmiki's Birthday): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-10-26 | 2026-10-26 | 0.00 days | ± 0 days |
dopt-2026-vasant_panchamiGovernment of India, DoPT OM F.No.12/2/2023-JCA dated 2025-07-03 (restricted holidays, Sri Panchami, Basant Panchami): https://documents.doptcirculars.nic.in/D2/D02est/Holidays%20to%20be%20observed%20in%20Central%20Government%20Offices%20during%20the%20year%2020265vgBs.pdf |
Festival date | ✓ Pass | 2026-01-23 | 2026-01-23 | 0.00 days | ± 0 days |
kolkata-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=22.5726,88.3639&tz=5.5 |
Sunrise | ✓ Pass | 2026-02-14T06:09 | 2026-02-14T06:09:07 | +0.13 min | ± 1.5 min |
kolkata-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=22.5726,88.3639&tz=5.5 |
Sunset | ✓ Pass | 2026-02-14T17:32 | 2026-02-14T17:32:29 | +0.49 min | ± 1.5 min |
lahiri-ayanamsa-1950-01-01Swiss Ephemeris true Lahiri ayanamsa at 00:00 UT (Jagannatha Hora tables); same value asserted in src/tests/panchang.test.ts |
Ayanamsa | ✓ Pass | 23:09:28 | 23:09:28 | +0.03 arcsec | ± 1 arcsec |
lahiri-ayanamsa-2000-01-01Swiss Ephemeris true Lahiri ayanamsa at 00:00 UT (Jagannatha Hora tables); same value asserted in src/tests/panchang.test.ts |
Ayanamsa | ✓ Pass | 23:51:12 | 23:51:11 | -0.71 arcsec | ± 1 arcsec |
lahiri-ayanamsa-2025-01-01Swiss Ephemeris true Lahiri ayanamsa at 00:00 UT (Jagannatha Hora tables); same value asserted in src/tests/panchang.test.ts |
Ayanamsa | ✓ Pass | 24:12:23 | 24:12:23 | -0.05 arcsec | ± 1 arcsec |
lahiri-ayanamsa-2026-01-01Swiss Ephemeris true Lahiri ayanamsa at 00:00 UT (Jagannatha Hora tables); same value asserted in src/tests/panchang.test.ts |
Ayanamsa | ✓ Pass | 24:13:19 | 24:13:18 | -0.57 arcsec | ± 1 arcsec |
london-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=51.5085,-0.1257&tz=0 |
Sunrise | ✓ Pass | 2026-02-14T07:16 | 2026-02-14T07:16:20 | +0.34 min | ± 1.5 min |
london-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=51.5085,-0.1257&tz=0 |
Sunset | ✓ Pass | 2026-02-14T17:14 | 2026-02-14T17:13:40 | -0.33 min | ± 1.5 min |
mumbai-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=19.0728,72.8826&tz=5.5 |
Sunrise | ✓ Pass | 2026-02-14T07:07 | 2026-02-14T07:07:22 | +0.38 min | ± 1.5 min |
mumbai-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=19.0728,72.8826&tz=5.5 |
Sunset | ✓ Pass | 2026-02-14T18:38 | 2026-02-14T18:38:02 | +0.04 min | ± 1.5 min |
new-delhi-2026-01-03-tithi_end-purnimaUS Naval Observatory Moon phases (public domain; Full Moon = elongation 180°, end of Purnima): https://aa.usno.navy.mil/api/moon/phases/year?year=2026 |
Tithi end | ✓ Pass | 2026-01-03T15:33 | 2026-01-03T15:32:48 | -0.19 min | ± 1.5 min |
new-delhi-2026-01-18-tithi_end-amavasyaUS Naval Observatory Moon phases (public domain; New Moon = elongation 0°, end of Amavasya): https://aa.usno.navy.mil/api/moon/phases/year?year=2026 |
Tithi end | ✓ Pass | 2026-01-19T01:22 | 2026-01-19T01:21:53 | -0.12 min | ± 1.5 min |
new-delhi-2026-02-01-tithi_end-purnimaUS Naval Observatory Moon phases (public domain; Full Moon = elongation 180°, end of Purnima): https://aa.usno.navy.mil/api/moon/phases/year?year=2026 |
Tithi end | ✓ Pass | 2026-02-02T03:39 | 2026-02-02T03:39:08 | +0.15 min | ± 1.5 min |
new-delhi-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=28.6139,77.209&tz=5.5 |
Sunrise | ✓ Pass | 2026-02-14T07:00 | 2026-02-14T07:00:28 | +0.47 min | ± 1.5 min |
new-delhi-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=28.6139,77.209&tz=5.5 |
Sunset | ✓ Pass | 2026-02-14T18:10 | 2026-02-14T18:10:28 | +0.47 min | ± 1.5 min |
new-delhi-2026-02-17-tithi_end-amavasyaUS Naval Observatory Moon phases (public domain; New Moon = elongation 0°, end of Amavasya): https://aa.usno.navy.mil/api/moon/phases/year?year=2026 |
Tithi end | ✓ Pass | 2026-02-17T17:31 | 2026-02-17T17:31:03 | +0.05 min | ± 1.5 min |
new-delhi-2026-03-03-tithi_end-purnimaUS Naval Observatory Moon phases (public domain; Full Moon = elongation 180°, end of Purnima): https://aa.usno.navy.mil/api/moon/phases/year?year=2026 |
Tithi end | ✓ Pass | 2026-03-03T17:08 | 2026-03-03T17:07:47 | -0.20 min | ± 1.5 min |
new-delhi-2026-04-17-tithi_end-amavasyaUS Naval Observatory Moon phases (public domain; New Moon = elongation 0°, end of Amavasya): https://aa.usno.navy.mil/api/moon/phases/year?year=2026 |
Tithi end | ✓ Pass | 2026-04-17T17:22 | 2026-04-17T17:21:42 | -0.30 min | ± 1.5 min |
new-york-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=40.7143,-74.006&tz=-5 |
Sunrise | ✓ Pass | 2026-02-14T06:51 | 2026-02-14T06:51:05 | +0.09 min | ± 1.5 min |
new-york-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=40.7143,-74.006&tz=-5 |
Sunset | ✓ Pass | 2026-02-14T17:30 | 2026-02-14T17:29:43 | -0.27 min | ± 1.5 min |
sydney-2026-02-14-sunriseUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=-33.8688,151.2093&tz=11 |
Sunrise | ✓ Pass | 2026-02-14T06:29 | 2026-02-14T06:29:01 | +0.02 min | ± 1.5 min |
sydney-2026-02-14-sunsetUS Naval Observatory (public domain): https://aa.usno.navy.mil/api/rstt/oneday?date=2026-02-14&coords=-33.8688,151.2093&tz=11 |
Sunset | ✓ Pass | 2026-02-14T19:49 | 2026-02-14T19:49:01 | +0.02 min | ± 1.5 min |
What a pass means
A value passes when it lies within the tolerance stated for it: no difference for a festival date, a minute and a half for sunrise and sunset, a few minutes for the end of a tithi. Deviations are shown with their sign, so a bias in one direction is visible. A failure is emailed to the operator the same day. The method behind every calculation is documented on the methodology page.