Computes sun and moon times — sunrise, sunset, day length, twilight, golden hour, moon phases — for Polish places or any coordinates.
What you can do
Get sunrise, sunset, solar noon, day length, twilight and golden/blue hours for a place and day
Get a month calendar of sunrise, sunset and day length with day-to-day changes
Get moonrise, moonset, phase, lit part and the next new and full moons
List new moons, quarters and full moons between two dates
Get Polish clock-change dates and the December and June solstices
Look up the site's 258 places by name, with coordinates and time zone
When to use it
Useful when someone asks when the sun rises or sets, how long the day is, when golden-hour photos are possible, or when the next full moon or clock change falls, especially for Poland.
Requirements
Remote endpoint at slonce.info.pl over streamable HTTP; no account, API key or environment variable is needed. Places can be named from the site's list or given by coordinates and time zone.
Before you install
No credentials are requested. The service states that submitted data is used only for the calculation and not stored; times are local clock time to the minute, with Polish time as the default for clock changes and solstices.
Enable the server for the chats that should use its tools.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Use with an agent
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/pl.info.slonce%2Fslonce/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.
Sunrise, sunset, solar noon and day length at a place on a day (today by default), with how much longer or shorter the day is than the day before, civil, nautical and astronomical twilight, and the golden and blue hours for photos. Local clock time, to the minute.
Parameterstzlatloncitydatelang
sun_calendar
Sunrise and sunset for a month
Sunrise, sunset and day length for every day of a month at a place, with the change of the day length from day to day; the link opens the same calendar to print on one A4 page.
Parameterstzlatloncitylangmonth
moon_times
Moonrise, moonset and phase
Moonrise and moonset at a place on a day (today by default), the moon's phase and lit part, a new or full moon or quarter that day, and the next new and full moon.
Parameterstzlatloncitydatelang
moon_phases
New and full moons
The new moons, first quarters, full moons and last quarters between two dates (two years at most; from today for 60 days by default), to the minute in a time zone (Polish time by default).
Parameterstotzfromlang
clock_change
Clock changes in Poland
When the clocks change in Poland in a year (this year by default): the dates, which way and at what time, and the next change from today.
Parameterslangyear
solstice
Shortest and longest day
The December and June solstices of a year (this year by default) to the minute, Polish time; with a place, also its shortest and longest day, the earliest sunset and the latest sunrise of the winter.
Parameterstzlatloncitylangyear
find_city
Find a place
The site's places whose name starts with the text (Polish or English names, with or without Polish letters): 258 places (Polish cities, places for trips and a few cities abroad), with coordinates, time zone and page.
Parameterslanglimitqueryrequired
Version history
1
v1.0.0LatestNov 5, 2026
Score
83%
83% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.