stat -c %y vs.exe | awk '{printf $1 "\n"}'
I found awk one of the most useful tools (almost like grep or sed).
awk treats the input line as a (database) record containing fields, using (by default) the space character as the field separator (but a different field separator can be specified in the command).
Then you can refer to any field of the line using its index ($1, $2, $3, etc.)
Examples:
stat -c %y vs.exe | awk '{printf $1 ":" $3 "\n"}'
will print the first and the third fields on each line, putting ":" between the fields.
stat -c %y vs.exe | awk '{printf $1 ":" $3 }'