Datetime: allow date-only and time-only display

[wvdvegte]

What's your use case?
I don't know if this is at all possible, but when looking at daily patterns it sometimes makes sense to consider hh:mm:ss without considering yyyy:mm:dd preceding it. Currently, if my data contains time by specifying hh:mm:ss only, Orange assumes that this time is specified for 1970-01-01, so wherever the time appears in, for instance a data table, it is shown as 1970-01-01 hh:mm:ss.
For instance, I'm currently working on a tutorial on classification of people's presence in a room in order to provide predictions for a smart thermostat based on day of the week and time of the day, where at some point I split up the datetime in date and time.
It is annoying that I have to tell my students why this date 1970-01-01 is always there, and, also it is annoying having to deal with this unnecessarily space-consuming datetime expression in, for instance inequalities showing up in Tree Viewer.
Likewise, if only yyyy-mm-dd is specified, it is always assumed that the time is 00:00:00, which is then also displayed in all cases.
I vaguely remember this was different in the past but I'm not sure.

What's your proposed solution?
automatically disregard yyyy-mm-dd if it isn't specified, and also automatically disregard hh:mm:ss if it isn't specified.

Are there any alternative solutions?
In some cases, converting to a string using Formula, and removing the unneeded part helps for presentation purposes, but this won't work, for instance, in Tree Viewer.

[ales-erjavec]

I vaguely remember this was different in the past but I'm not sure.

I think this might be a difference between File and CSV Import widget behavior.

[wvdvegte]

Hmm, yes, not necessarily the widget but the file type matters. If I store my data as xlsx, the date 01-01-1970 is added to hh:mm:ss input. If I store it as csv, it remains hh:mm:ss. Even if I open it in the File widget. Strange.