Hi Aleksandr,
Thanks for reaching out!
The source file depends on which view you’re trying to customize…That wording actually comes from the tribe_events_title() function that you will find in (I believe all) of the view templates – month, list, photo, etc. You can customize them by copying them into your child theme and following the instructions in our themer’s guide. Look for this line:
<?php echo tribe_get_events_title() ?>
You’ll want to replace <?php echo tribe_get_events_title() ?> with your new text.
Please let me know if you have any more questions!
Thanks,
Jennifer