Wildcard string in notepad++ to replace date format

This will replace / with - only inside tag <pk2>...</pk2>.

Tell me if you want to replace other dates.

• Ctrl+H
• Find what: (?:<pk2>|\G(?!^))\d+\K/(?=.*</pk2)
• Replace with: -
• CHECK Match case
• CHECK Wrap around
• CHECK Regular expression
• UNCHECK . matches newline
• Replace all

Explanation:

(?:             # non capture group
    <pk2>           # opening tag pk2
  |               # OR
    \G(?!^)         # restart from last match position if not beginning of line
)               # end group
\d+             # 1 or more digits
\K              # forget all we have seen until this position
/               # a slash
(?=             # positive lookahead, make sure we have after:
    .*              # 0 or more any character but newline
    </pk2           # closing tag
)               # end lookahead

Screenshot (before):

Screenshot (after):