Not that exactly. The claim is that they were taken on the 1st April at about midday.
They came out after the event remember. Nothing easier than for someone to change the date on the photo.
And thanks to orbital mechanics, easy to check one way or the other.
Just to clarify: the claim from the Southfront website is that the photos were taken on the 1st April at 11.57 GMT, which is about 2pm EET, which is the Kiev timezone.