a command-line program for tracking sunrise and sunset times (Mac / Linux)
It tells you the sunrise, sunset, solar noon times and day length. It also projects these changes over the
next ten days.
daylight uses your IP-based location and timezone to tailor the results to your geometry. It works in (ant)arctic
locations, and you can override the IP location if you’re travelling / on a VPN.
I love the sunlight and dread the long, dark winter evenings of Northern Europe. I often look up sunrise / sunset times
and count off the days until the dreary darkness is gone.
(IP lookup is powered by https://ipinfo.io. They provide a good service so please don’t spam requests.)
# Add my tap (formula repository) brew tap jbreckmckye/formulae # Install daylight brew install daylight # Check it daylight --help
Pick up the executable for your system in the releases.
Unzip the package and put the program in a folder that’s within your system PATH.
There is a Windows binary but I haven’t been able to test this. Let me know if you get it working.
# Today's data for your IP location daylight # Override the IP location and timezone daylight --loc="-33.92,18.42" --timezone="Africa/Johannesburg" # Short summary of the data daylight --short # Data for another date daylight --date="2025-12-31" # Disable the colour output NO_COLOR=true daylight # Show help daylight --help
Daylight will attempt to adapt to your terminal background colour (dark vs light) but this might not work well for your
colour scheme. In this case you can use NO_COLOR to disable any colours
$ NO_COLOR=true daylight
Today's daylight
════════════════════════════════════════════════════════════════════════════
Rises Noon Sets
06:30 AM 12:11 PM 17:52 PM
Day length
════════════════════════════════════════════════════════════════════════════
Daylight for: versus yesterday:
11 hrs, 22 mins +3m 58s
....................R---------------------------------S..................
Ten day projection
════════════════════════════════════════════════════════════════════════════
┌────────────────┬──────────────┬──────────────┬─────────────────────┐
│ DATE │ SUNRISE │ SUNSET │ LENGTH │
├────────────────┼──────────────┼──────────────┼─────────────────────┤
│ Sun Mar 09 │ 06:28 AM │ 17:54 PM │ 11 hrs, 26 mins │
│ Mon Mar 10 │ 06:25 AM │ 17:55 PM │ 11 hrs, 30 mins │
│ Tue Mar 11 │ 06:23 AM │ 17:57 PM │ 11 hrs, 34 mins │
│ Wed Mar 12 │ 06:21 AM │ 17:59 PM │ 11 hrs, 37 mins │
│ Thu Mar 13 │ 06:19 AM │ 18:01 PM │ 11 hrs, 41 mins │
│ Fri Mar 14 │ 06:16 AM │ 18:02 PM │ 11 hrs, 45 mins │
│ Sat Mar 15 │ 06:14 AM │ 18:04 PM │ 11 hrs, 49 mins │
│ Sun Mar 16 │ 06:12 AM │ 18:06 PM │ 11 hrs, 53 mins │
│ Mon Mar 17 │ 06:09 AM │ 18:07 PM │ 11 hrs, 57 mins │
│ Tue Mar 18 │ 06:07 AM │ 18:09 PM │ 12 hrs, 1 mins │
└────────────────┴──────────────┴──────────────┴─────────────────────┘
Your stats
════════════════════════════════════════════════════════════════════════════
LOCATION Latitude 51.51, Longitude -0.1257 IP ADDRESS 146.90.4.96
There is also a short summary mode
$ daylight --short
Rises: 06:30 AM
Sets: 17:52 PM
Length: 11 hrs, 22 mins
9 Comments
japaget
Windows build works fine (Windows 10 Professional x64 22H2).
rrr_oh_man
Great looking app!!
I immediately checked how you do location lookups:
> IP lookup is powered by https://ipinfo.io. They provide a good service so please don't spam requests.
There was a thread about them recently — the scale of their operation was very surprising.
thenthenthen
Cool! Can we use the sky hue as Terminal background or overal “theme”?
oftenwrong
I was curious how the times were obtained. It uses https://github.com/nathan-osman/go-sunrise , which links to this calculation method: https://en.wikipedia.org/wiki/Sunrise_equation#Complete_calc…
ndegruchy
Of course, you can get this information in Emacs, too. You'll need to get your lat and long, first:
Then, you can `M-x sunrise-sunset` and see the times (and total daylight hours) in the echo area.
jrootabega
Is the noon color scheme supposed to look like Finn from Adventure Time?
voidUpdate
Does this pull the times from an online service or are they calculated locally? I tried to read the code to work it out but I don't program in Go so I got a little lost
kseistrup
This is nice, I like it!
Is there a way to make it use 24h time, rather than AM/PM?
JimmyDeep
I live in a place where it often rains, and I really love sunny weather. It makes me feel a bit down when I see that it's already dark by the time I get off work. I was wondering, since the Earth's revolution is taken into account, the time you get should be different every day, right?