This question has been answered by BobRay. See the first response.
[[*TV_name:strtotime:strftime=`%a %b %e, %Y`]]
You'd have to look in the modx_site_tmplvar_contentvalues table to be sure.That is the exact table i was looking at when i quoted the variable types. And yes, my eyes are telling me truth, i see "mediumtext" as a data type of my T.V. (not an "int") which stores date. Seems that something is working not as we could think of it.

[ed. note: tester3 last edited this post 8 years, 11 months ago.]
I assume that you created the TVs themselves before importing.Yes. I created them before using ImportX.
What do you see when you use a TV tag to display them?
[DEBUG_START]is rendered in the content as:
[[*spoffer_date_start]]
[DEBUG_END]
[DEBUG_START] 2017-01-10 09:32:00 [DEBUG_END]
What's in the 'type' field in the modx_site_tmplvars table?for the TV with id=36 ('spoffer_date_start')

[[*TV_name:strtotime:strftime=`%a %b %e, %Y`]]