Timeboard

**Release date:** June 25, 2022

Resolved issues
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* Fixed changed in import path for Iterables.
* Tested compatibility with Python 3.9, 3.10.

**Release date:** May 01, 2020

Resolved issues
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* Incompatibility with the breaking API changes introduced in pandas 1.0

Miscellaneous
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* Russian business day calendar has been updated for 2020.

**Release date:** May 01, 2019

Resolved issues
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Breaking changes were introduced in pandas versions 0.23 and 0.24

* Pandas 0.23 moved `is_subperiod` function to another module
* Workaround for pandas issue 26258 (Adding offset to DatetimeIndex is broken)

**Release date:** January 15, 2019

Miscellaneous
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* Business day calendars for RU, UK, and US have been updated

**Release date:** March 01, 2018

New features
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* `Interval.overlap()` (also ``*``) - return the interval that is the intersection of two intervals.

* `Interval.what_portion_of()` (also ``/``) - calculate what portion of the other interval this interval takes up.

* `Interval.workshifts()` - return a generator that yields workshifts with the specified duty from the interval.

* Work time calculation: `Workshift.worktime()`, `Interval.worktime()`.

Miscellaneous
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* Performance: building any practical timeboard should take a fraction of a second.

* Documentation: added "Common Use Cases" section. It is also available as a jupyter notebook.

**Release date:** February 01, 2018

This is the first release.