cannot pass tests, HTTP/400 for dates 3 years+

I cannot pass tests, because test engine attempts to send dates in 2014 and 2016. But now it is 2020, and sendgrid stats are not allowing to query more than 3 years in past, so while with sane dates I get sane results, in test i get error:

``` BadRequestsError: HTTP Error 400: BAD REQUEST, how_spammed, 9 ```