Conpherence - fix off by one bug in calendar data fetching
Summary: Ref T3155. "last sunday" is "last sunday at 00:00" so you have to include a day for Sunday itself.
Test Plan: calendar renders correctly today - saturday - which is the edge case of this
Reviewers: epriestley, chad
Reviewed By: chad
CC: aran, Korvin
Maniphest Tasks: T3155
Differential Revision: https://secure.phabricator.com/D6108