Yes. For that, please do the following:
1) Don’t forget to take a backup of the file prior to any change.
2) Please install and activate child theme, otherwise you will lose the changes when you upgrade the theme.
3) Copy header.php from the parent theme and paste in to the khore-child theme folder
4) Open header.php from the child theme and search for the following code (apx line no:164 -168):
<!– countdown –>
<!– /countdown –>
5) Cut this code and paste in to just above the following code
6) Update the file.