Which side of the train, bus, plane or ferry gets the sun on your trip, and which window your landmark is behind. Two cities, a departure time. Free.
All the free tools
Every tool fastast serves, each on its own page. No account, no e-mail, nothing stored — open one, use it, close the tab.
Every tool here does one thing, on one page, and asks nothing of you: no account, no e-mail address, no cookie banner to dismiss before you can work. Type what you need, read the answer, close the tab. Nothing you enter is kept.
Each tool has its own address, so a link to one is a link to that tool alone. The list below is the whole set, and the search box filters it by name or by what a tool does.
What colour the clear sky is over any city, right now or at a chosen moment: the gradient, hex codes and CSS, the light of the hour and when it changes.
Every retrograde period of a year, Mercury through Pluto, station to station with dates and durations. Download the table or subscribe as a calendar.
How many days until a date — a wedding, a launch, a race — drawn as a card that says when it was counted. Free, no sign-up, and the link keeps counting.
How many days since a date — together, sober, since the dog came home — drawn as a card with the next milestone on it. Free, no sign-up, nothing stored.
What time it is in any city, with time zone, UTC offset and daylight saving. Convert between two cities, copy the epoch, ISO 8601 or Discord timestamp.
Equinox and solstice dates for any year, to the minute in UTC, with cross-quarter days, perihelion, aphelion and your own longest day. Free.
Golden hour, blue hour, sunrise, sunset and day length for your city, day by day over a month, in local time. Free, no sign-up.