Period: Time range API for php

Date/time programming is one of the tricky aspects of software development. Although inherently not complex in itself, coding date/time algorithms can be a subtle source of bugs. Especially in web development a feature such as payment subscription processing that ranges from days to weeks to months can get complex quickly. Also such kind of scenarios require additional features like auto renewal, scheduled email alerts to subscribers etc. Such kind of features require good date/time handling algorithms and libraries that handle such chores are always welcome.
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Flexible date manipulation in javascript

Date manipulation is a common programming task a developer does regularly and many times can get tricky and cumbersome. If youy web applications relies heavily on date manipulation on the frontend than moment.js is the library you have been looking for.

In short this is what you can do with moment.js

moment("20111031", "YYYYMMDD").fromNow(); // 2 years ago
moment().endOf('day').fromNow(); // in 2 hours
moment().startOf('hour').fromNow(); // 9 minutes ago

moment().subtract('days', 6).calendar(); // Last Wednesday at 10:09 PM
moment().add('days', 1).calendar(); // Tomorrow at 10:10 PM

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