Add command line option --start-time

[HiRolla]

It would be great to be able to specify not only the end time of the timer, but also the start time, which is different from the current moment.
In my case, it is important to be able to specify a start time that has already passed, for example, the beginning of a week, month or season.
This is useful if, after restarting the computer, I want to resume timing without losing progress.

For example, when half of the month is already over, I don’t want a restart. I want to see how the whole month is divided into two parts: the past and the remaining.

[i2van]

As I understood the point is to measure time passed up to this particular moment? It looks like a task tracker responsibility and and not a timer's one.

[i2van]

The simplest way is to put start time into the header. This can be done by using command-line.

[HiRolla]

the point is to measure time passed up to this particular moment?

First of all, it is important for a better sense of time when looking at the progress bar. This option would allow me to keep a visible time scale. For example, 100% = the whole working day. Then I will be able to see time behind and ahead with a clear and already familiar scale and speed of progress.