Current civil time
Sep 1, 4:02:07 PM
Shown in the selected location's time zone when available.
Why this time?
Halachic time calculation
This explanation uses the active sunrise-to-sunset or sunset-to-sunrise segment.
Location-based options
Shabbos Times
Choose the offsets used for this device. The common general setting is 18 minutes before sunset. Jerusalem commonly uses 40 minutes. Confirm the appropriate custom with your local rav.
Install the clock
Add to Home Screen
In Safari, tap the Share button, then choose “Add to Home Screen.” The installed clock opens in its own full-screen window.
New York, USA
Lat 40.7128, Lng -74.0060
Sunrise-Sunset API v2 data ready for 40.7128, -74.0060. Time zone: America/New_York. Last refresh at 3:59 PM.
Browser geolocation usually needs HTTPS and user permission. The Beis Hamikdash toggle uses Har HaBayis at 31.7780, 35.2353 with the Asia/Jerusalem time zone. All coordinates use Sunrise-Sunset API v2, which supplies the location's own time zone and reports polar days explicitly.
Current moon
🌖 Waning Gibbous
Moon phase updates at the end of each halachic date.
How This Clock Works
The arc divides the active day or night into twelve proportional halachic hours, then tracks the current hour and chelek live.
Basic Sunrise Model
Daytime runs from sunrise to sunset. Nighttime runs from sunset to the next sunrise. This is a clear baseline model, not a substitute for a local posek or full zmanim calendar.
1080 Chalakim
Each proportional hour is divided into 1080 chalakim, so the center display shows both the current halachic hour and the live chelek count within that hour.
Location Aware
Choose a major city, use browser geolocation, or enter coordinates. The clock stores your last selected location on this device for the next visit.
Hour boundaries
Day segment from 6:21 AM to 7:29 PM.
Day hour 1
6:21 AM to 7:27 AM
Starts at Sep 1, 6:21:57 AM
Length: 1h 5m 40s
Day hour 2
7:27 AM to 8:33 AM
Starts at Sep 1, 7:27:37 AM
Length: 1h 5m 40s
Day hour 3
8:33 AM to 9:38 AM
Starts at Sep 1, 8:33:17 AM
Length: 1h 5m 40s
Day hour 4
9:38 AM to 10:44 AM
Starts at Sep 1, 9:38:57 AM
Length: 1h 5m 40s
Day hour 5
10:44 AM to 11:50 AM
Starts at Sep 1, 10:44:37 AM
Length: 1h 5m 40s
Day hour 6
11:50 AM to 12:55 PM
Starts at Sep 1, 11:50:17 AM
Length: 1h 5m 40s
Day hour 7
12:55 PM to 2:01 PM
Starts at Sep 1, 12:55:57 PM
Length: 1h 5m 40s
Day hour 8
2:01 PM to 3:07 PM
Starts at Sep 1, 2:01:37 PM
Length: 1h 5m 40s
Day hour 9
3:07 PM to 4:12 PM
Starts at Sep 1, 3:07:17 PM
Length: 1h 5m 40s
Day hour 10
4:12 PM to 5:18 PM
Starts at Sep 1, 4:12:57 PM
Length: 1h 5m 40s
Day hour 11
5:18 PM to 6:24 PM
Starts at Sep 1, 5:18:37 PM
Length: 1h 5m 40s
Day hour 12
6:24 PM to 7:29 PM
Starts at Sep 1, 6:24:17 PM
Length: 1h 5m 40s