How can I change the date of a scheduled post using the YouTube API?

Question

Google

The rest of the text parameters change normally.
It is not possible to change the date of the scheduled publication.
I do as in the examples from dev google, like this
$videoSnippet['privacyStatus'] = "private";
$videoSnippet['publishAt'] = "2016-03-01T16:46:07+00:00";
I tried the string date in different spellings according to the format