Hi Doron,
Thanks for reaching out!
Are you referring to the email field for Organizers? You can make that email field mandatory by adding a little bit of custom code – luckily, we have a guide showing you exactly what to do!
The time format actually comes from your general WordPress settings that apply to the whole site. If you only want to change the setting for the Community Events form, there’s a snippet in this post that will do that for you!
If you need any help adding this code to your site, please let me know!
Thanks,
Jennifer