Renamed to ad-si/Vectual. That is where the repository lives now. It has not been published as a package under the new name.
Versions published as adius/vectual still install under that name. 3 versions of 7 come from the new location (see their notes).
Rerouted (renamed, verified). The GitHub user or repository was renamed. The tag is still there, at the new name. The Lamdera package server serves a copy recovered from https://github.com/ad-si/Vectual.
What we checked: The repo moved to github.com/ad-si/Vectual and tag 4.0.0 is there; its commit 0d3f2db59855 is from 2021-02-13 17:06 UTC, before the version was published (2021-02-13 17:07 UTC); elm.json is byte-identical to package.elm-lang.org's; the exposed modules match docs.json; the zip's SHA-1 is not the published one (GitHub's zip no longer comes out byte for byte the same), so the contents were checked instead.
The Lamdera compiler uses this copy and prints a one-line notice saying so. elm itself fails to download this version.
Details · package.elm-lang.org's zip: https://github.com/adius/vectual/zipball/4.0.0/
Date core.
Return integer as month. Jan <= 1 Feb == 2 up to Dec > 11.
Return days in month for year month.
List of months in order from Jan to Dec.
Return days in next calendar month.
Return days in next calendar month.
Days in month for given date.
Return True if Year is a leap year.
Return True if Year of Date is a leap year.
Return number of days in a year.
Return the Iso DayOfWeek Monday 1, to Sunday 7.
Return date of first day of month.
Return first of next month date.
Return date of last day of month.
Return last of previous month date.
Return number of days back to start of week day.
First parameter Weekday - is current day of week. Second parameter Weekday - is start day of week.
Convenience fromTime as time ticks are Elm Ints in this library.
Return next day in calendar sequence.
Return previous day in calendar sequence.
Return next month in calendar sequence.
Return previous month in calendar sequence.
Epoch starting point for tick 0.
Ticks in a millisecond. (this is 1 on Win 7 in Chrome)
Ticks in a second.
Ticks in a minute.
Ticks in an hour.
Ticks in a day.
Ticks in a week.
Return month as integer. Jan = 1 to Dec = 12.