Millis2Quarter is a free Chrome add-on developed by Emily Warman. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This handy extension allows users to convert between UTC milliseconds since epoch and UTC quarter.

With Millis2Quarter, you can easily determine the quarter in which an epoch millisecond timestamp falls. This is particularly useful if you need to work with time-based data and want to quickly identify the corresponding quarter. For example, a timestamp of, which corresponds to around January 3, 2019, 11:59 AM, would be converted to "2019Q1".

In addition to converting from millis to quarter, you can also convert from quarter to epoch millisecond timestamp. The converter will provide you with the first millisecond in the given quarter. So, if you input "2019Q1", the converter will return "", which corresponds to January 1, 2019, 12:00 AM.

Whether you are a developer, data analyst, or simply someone who frequently works with timestamps, Millis2Quarter is a useful tool to have in your browser. It simplifies the process of converting between millis and quarters, saving you time and effort.