This extension inspired by http://www.worldtimebuddy.com/.
It provides information about time of the day in different locations in very convenient way. As a data source it uses most recent version of IANA time zones database http://www.iana.org/time-zones provided by momentjs timezone library (http://momentjs.com/timezone/), it accounts daylight saving time in different regions. Features:
- show active DST for different regions (if available)
- show UTC offset
- export to .ICS file which could be opened in outlook
- export directly into your google calendar
- copy schedule into the clipboard
- theme customisation (light/dark, colors)

v1.4.179
- updated timezone db to 2018d version

v1.4.150
- added map timezone selector
- fixed several issues

v1.4.141
- added lookup by UTC offset value (when add new timelines)
- added displaying timezone abbreviation if available

v1.4.105
- fixed scroll issue
- updated all styles
- updated timezones db
- supported theming
- supported dark theme
- fixed displaying of fractional timezone offset
- added possibility to scroll timelines horizontally

v1.2.30
- fixed bug with adding new timeline when only one timeline is presented
- added 'reset to defaults' button to clear settings
- removed unnecessary permission

v1.1.21
- fixed bug with initialization

v1.1.19
- fixed bug with dislaying DST flag

v1.1.15
- bug fixes

v1.1.13
- extended clickable area for range selector

v1.1.10
- start of selected range is set to current time by default
- extended clickable area for range selector