Hi,
I have several bookmarks and corresponding names and texts as follows:

[bookmark name : bookmark text]

Project_1_bookmark1:Project1_Nov_2018
Project_2_bookmark2:Project2_Jan_2019
Project_3_bookmark3:Project3_Mar_2019

I need to change all the bookmark texts about year into 2020

i.e.

Project_1_bookmark1:Project1_Nov_2020
Project_2_bookmark2:Project2_Jan_2020
Project_3_bookmark3:Project3_Mar_2020

How can I do that?

Thanks in advance!