Articleship test: 1st year completed

My query is regarding the current articleship test.
My articleship started on 1st April 2017 and hence successfully completed my 1st year. The area of my doubt is in the date of 1st year's completion! Is it 31st march 2018 or 1st April 2018? The former date makes me ineligible for the 1st practice test whereas the latter date confirms the first test. Please help.

Any difference in opinion is genuinely accepted.