<P> List of the last five seasons completed by the Celtics . For the full season - by - season history, see List of Boston Celtics seasons . </P> <P> Note: GP = Games played, W = Wins, L = Losses,% = Winning Percentage; </P> <Table> <Tr> <Td> Season </Td> <Td> GP </Td> <Td> </Td> <Td> </Td> <Td>% </Td> <Td> Finish </Td> <Td> Playoffs </Td> </Tr> <Tr> <Td> 2012--13 </Td> <Td> 81 </Td> <Td> 41 </Td> <Td> 40 </Td> <Td>. 506 </Td> <Td> 3rd, Atlantic </Td> <Td> Lost in First Round, 2--4 (Knicks) </Td> </Tr> <Tr> <Td> 2013--14 </Td> <Td> 82 </Td> <Td> 25 </Td> <Td> 57 </Td> <Td>. 305 </Td> <Td> 4th, Atlantic </Td> <Td> Did not qualify </Td> </Tr> <Tr> <Td> 2014--15 </Td> <Td> 82 </Td> <Td> 40 </Td> <Td> 42 </Td> <Td>. 488 </Td> <Td> 2nd, Atlantic </Td> <Td> Lost in First Round, 0--4 (Cavaliers) </Td> </Tr> <Tr> <Td> 2015--16 </Td> <Td> 82 </Td> <Td> 48 </Td> <Td> 34 </Td> <Td>. 585 </Td> <Td> 2nd, Atlantic </Td> <Td> Lost in First Round, 2--4 (Hawks) </Td> </Tr> <Tr> <Td> 2016--17 </Td> <Td> 82 </Td> <Td> 53 </Td> <Td> 29 </Td> <Td>. 646 </Td> <Td> 1st, Atlantic </Td> <Td> Lost in Conference Finals, 1--4 (Cavaliers) </Td> </Tr> <Tr> <Td> 2017--18 </Td> <Td> 82 </Td> <Td> 55 </Td> <Td> 27 </Td> <Td>. 671 </Td> <Td> 2nd, Atlantic </Td> <Td> Lost in Conference Finals, 3--4 (Cavaliers) </Td> </Tr> </Table> <Tr> <Td> Season </Td> <Td> GP </Td> <Td> </Td> <Td> </Td> <Td>% </Td> <Td> Finish </Td> <Td> Playoffs </Td> </Tr>

When was the last time the celtics made it to the finals