Undertime - Matching Up Time Zones

Occasionally I need to setup teleconferences with people in different time zones. For two timezones I am still able to do the calculations and assessment of the possibilities in my head. However, once three or more timezones are involved, I find myself requiring some assistance.

Already a while ago I found the neat little Python script undertime which is very easy to use.

Say for example I want to setup a call for a final synchronization before going into Christmas holiday between persons in Los Angeles, New York and myself I could easy visualize the opportunities with this simple call

The warning simply informs me that undertime will always consider my current timezone, so the first argument "Berlin" was in fact redundant. The program is reasonably good at guessing the time zones in question, but if in doubt "undertime --print-zones" lists the available repertoire.

By using the "--date" argument I explicitly requested a specific day to be considered. Without that argument, undertime would consider the current date and this could be a problem if the meeting is close to a daylight savings boundary. So to be on the safe side it is wise to use this argument.

People using Debian 10 (Buster) or newer can install the program easily like this:

dzu@krikkit:~$ sudo apt install undertime
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  undertime
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 31.8 kB of archives.
After this operation, 93.2 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian buster/main amd64 undertime all 1.7.0 [31.8 kB]
Fetched 31.8 kB in 0s (361 kB/s)
Selecting previously unselected package undertime.
(Reading database ... 292416 files and directories currently installed.)
Preparing to unpack .../undertime_1.7.0_all.deb ...
Unpacking undertime (1.7.0) ...
Setting up undertime (1.7.0) ...
Processing triggers for man-db (2.8.5-2) ...
dzu@krikkit:~$