The starting dates for the past Easter Events were as follows:
2009: April 12
2010: April 3
2011: April 19
2012: April 5
2013: March 23
2014: April 12
2015: March 28
2016: March 19
2017: April 7
2018: March 24
2019: April 13
2020: April 4
The starting dates for the past Summer Events were as follows:
2011: July 18
2012: July 14
2013: July 23
2014: July 25
2015: July 25
2016: July 15
2017: July 22
2018: July 21
2019: July 27
The starting dates for the past Halloween Events were as follows:
2009: October 22
2010: October 19
2011: October 17
2012: October 20
2013: October 25
2014: October 17
2015: October 23
2016: October 21
2017: October 21
2018: October 20
2019: October 19