Below are the dates for, among others, Grandparents' Day 2012 and Grandparents' Day 2013.
You can also see on which day the holiday falls and how many days it is until this holiday.

Holiday	Date		Week number	Number of days to go
Grandparents' Day 2012	September 9, 2012	Sunday	37	218
Grandparents' Day 2013	September 8, 2013	Sunday	37	582
Grandparents' Day 2014	September 7, 2014	Sunday	37	946
Grandparents' Day 2015	September 13, 2015	Sunday	38	1317
Grandparents' Day 2016	September 11, 2016	Sunday	37	1681
Grandparents' Day 2017	September 10, 2017	Sunday	37	2045
Grandparents' Day 2018	September 9, 2018	Sunday	37	2409
Grandparents' Day 2019	September 8, 2019	Sunday	37	2773
Grandparents' Day 2020	September 13, 2020	Sunday	38	3144
Grandparents' Day 2021	September 12, 2021	Sunday	37	3508
Grandparents' Day 2022	September 11, 2022	Sunday	37	3872

See besides 'Grandparents' Day' even more holidays, click on one of the links below.
2012 Holidays   •   2013 Holidays   •   2014 Holidays   •   2015 Holidays

See also the 2012 Calendar.