Changing time zones for published webinars

Hi @alina_t
you can change it individually on each webinar: 

And for the future you can change the timezone on your account, so all new webianrs are scheduled using your preferred time zone. This does not update existing webinars, which will remain in the timezone selected when they were scheduled
https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0063717#h_01GG5NFXQTC01XT5JF4TJEEE03

Hi @AnnikaZoom!
Thank you, but I don't need to change the time zone of all webinars. Just the three ones that are published. For the future ones, my time zone needs to remain the same.
Kindly,
Alina

You don't need to change timezones after they are published, as I cannot change the timezone of the timezone of my website, https://www.nullsbrawlak.com/, after development. Can I?