react-bootstrap-timezone-picker demo
React Timezone Picker
Hint: click on the time zone picker field to choose time zone.
You can also use mouse or up and down arrow keys for moving cursor and enter or left mouse click for selection.
If time zone picker field is active after selection is done, you can press enter to remove cursor or press up or down arrow keys to open selection once again.
Toggle 'Relative' or 'Absolute' button to change selection layout overflow.
(c) Yury Dymov