Hi allbiopro,
Thanks for reaching out to us!
Hmmm… I’m not quite sure what you mean. Do you want to show an extra set of dates for the event that shows the registration period for that event?
Events Calendar PRO includes so called ‘Additional Fields’ where you can define any kind of additional data. Field types are text field, text area, checkbox, radio button, dropdown / select, URL.
You can define 2 text fields (registration starts, ends) which you can then fill out when creating an event (screenshot: https://cloudup.com/iLXfznUa09B, and it will also show up on the front-end (screenshot: https://cloudup.com/ivMCEfgxWYU).
Would this work for you?
Cheers,
Andras