Hello Excel gurus
I'm back because I'm learning excel
today i need to learn from you ( if possible) how to create a unique list from differents sheets


normaly i'm able to create a unique list and I do it with INDEX and FREQUENCY function but this time i Stuck because the arrays are in two different sheets

ok this is the situation

Thank you!

A
1
 Sheet 1 dates
2
08/01/2016
3
08/01/2016
4
24/01/2016
5
07/02/2016
6
07/02/2016
7
23/02/2016


A
1
 Sheet 2 dates
2
08/01/2016
3
09/01/2016
4
10/01/2016
5
14/01/1900
6
07/02/2016
7
23/02/2016



A
1
 Expected result
2
08/01/2016
3
09/01/2016
4
10/01/2014
5
14/01/2016
6
24/01/2016
7
07/02/2016
8
23/02/2016