日記とか?action=CALENDAR?action=CALENDAR/2016-3-13?page=日記とか?action=CALENDAR?action=CALENDAR/2016-3-13

I think 15a works OK – it clearly indicates a “missing letter cou&2rncts#82t1;, and not too difficult to solve from there. Agree with Jezza on 26d – it was the first clue that I inserted – backwards as it turns out!