In both Clojure and Clojurescript versions, tick is just calling through to java.time methods. Understanding the main entities of java.time is necessary to use tick. For example, one should know that there are 2 separate ways to measure amounts of time (Period and Duration), 3 ways to represent a point on the timeline (Instant, ZonedDateTime & OffsetDateTime) and so on.

Instants are not 'calendar-aware' - they just contain millis+nanos fields representing an offset from the Unix epoch. This means Instants have no method to get their year or month for example, because to do so would require a calendar (e.g. the Gregorian calendar).

However, the following does work in Tick: (t/year (t/instant)). To make that possible, tick first converts the Instant into a ZonedDateTime (which does have a calendar). Take note however that the zone of the ZonedDateTime will be the browser’s or jvm’s timezone. To be explicit about the zone required do this:

The other cases where calendar-awareness might come up is when formatting Instants to string or when shifting them by e.g. years/months, so Tick shows explanatory error messages in that case.

make

=== Build a production version of the Documentation Site

The following is not working currently:

=== Develop Tick

 - To start testing clojurescript, follow instructions in the `cljs` ns.
 - To start testing clojure, follow instructions in the the `repl` ns.

See the .github dir to see instructions for CLI testing

=== Release

create a git tag.

`make install` (this installs in ~/.m2 - check that things look ok)

`make deploy`  - you need to have set up clojars credentials as per https://github.com/applied-science/deps-library

`git push origin new-tag-name`

== Acknowledgements

In particular, special credit to Eric Evans for discovering Allen's
interval algebra and pointing out its potential usefulness,
demonstrating a working implementation of Allen's ideas in
link:https://github.com/domainlanguage/time-count[his Clojure library].

Thanks also to my esteemed colleagues Patrik Kårlin for his redesign of
the interval constructor function, and Henry Widd for porting to cljc.

== References

* https://github.com/dm3/clojure.java-time
* https://clojuresync.com/emily-ashley/
* https://github.com/aphyr/tea-time
* https://github.com/sunng87/rigui

== Copyright & License

The MIT License (MIT)

Copyright © 2016-2021 JUXT LTD.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.