A simple date formatting/parsing library.
Clojure
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README.asciidoc

utc-dates

A simple date formatting/parsing library that (by default) normalizes all formatted dates to UTC, and assumes all date strings are indicated in UTC.

The default date format (held by date-format) is:

yyyy-MM-dd’T’HH:mm:ss.SSSZ

which can be dynamically rebound as desired.

All dates emitted by parse will have their time zone shifted to the local environment’s.

If it wasn’t obvious, this is not meant to be a general-purpose date/time library. Its intended use is to offer a simple API useful for representing/consuming dates within lexicographically-sensitive database systems (e.g. couchdb, AWS SimpleDB, etc).

"Installation"

utc-dates is available in Maven central. Add it to your Maven project’s pom.xml:

<dependency>
  <groupId>com.cemerick</groupId>
  <artifactId>utc-dates</artifactId>
  <version>0.0.2</version>
</dependency>

or your leiningen project.clj:

[com.cemerick/utc-dates "0.0.2"]

Usage

=> (require '[cemerick.utc-dates :as dates])
nil
=> (dates/format (java.util.Date.))
"2011-03-01T12:26:36.516+0000"
=> (dates/parse *1)
#<Date Tue Mar 01 07:26:36 EST 2011>
=> (dates/format (java.util.Date.) "HH:mm:ss")
"12:27:00"
=> (binding [dates/*time-zone* (java.util.TimeZone/getTimeZone "CST")]
     (dates/format (java.util.Date.)))
"2011-03-01T06:27:51.007-0600"

Need Help?

Ping cemerick on freenode irc or twitter if you have questions or would like to contribute patches.

License

Copyright © 2011 Chas Emerick

Licensed under the EPL. (See the file epl-v10.html.)