Moriarty opened the ticket and wrote:

r18669

The "Date" selection part of the world generator interface doesn't behave as expected. I enter 2020 and press ok, it changes to 2020. Fine.
But if I then click it again (bringing up the pop-up box again), enter "2030", but hit "cancel" in the box, rather than keep it at 2020, it reverts it to 1950. Cancel means to make NO change - it should stay at 2020. If I click "default" it switches to 1950, which is what I expect.

A second issue with it:
I've changed the date to 2000. I click it, up pops the box saying "2000". Fine. If I click it again (the same date element, not the now-popped-up box), the date in the element resets to 1950. Why? And even then the date in the box is still showing as 2000 unless I click it a third time which will set it down to 1950.

Reported version: trunk
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/3558