<Tr> <Th> Date </Th> <Td> Sunday after Pentecost </Td> </Tr> <Tr> <Th> 2017 date </Th> <Td> June 11 (Western) </Td> </Tr> <Tr> <Th> 2018 date </Th> <Td> May 27 (Western) </Td> </Tr> <Tr> <Th> 2019 date </Th> <Td> June 16 (Western) </Td> </Tr>

What is the most holy day in the christian (catholic) calendar