Is there a calendar for 2 time zones?

Question

iOS

I live in another country and work with a large hourly shift. I work in the RF belt, and I plan local affairs, of course, in the local zone. We need a calendar that would immediately show the time in the list next to each task both in the local and in the Russian Federation.
Conventional calendars only allow you to specify the time in any zone when assigning a task.
For example:
Local time zone is set in Google Calendar. I agree with a colleague in the Russian Federation to call at 18:00 and set the task for 18:00 and last for an hour. In the Google calendar, the task is set from 23:00 to 24:00 local time. I agree to call another colleague and I can’t answer him quickly when I’m free, because. in my calendar I will be free at 24 and have to subtract 24-5=19. This takes a considerable amount of time when it starts to happen frequently and when the numbers are not as round.

What are the solutions? It seems to me that indicating two times at once against the background of the task would be an ideal solution for people who live in two belts. Or some kind of fast switch belts with one button.