Are your forms coming from Airtable or somewhere else?
If they're coming from Airtable, you can change the default time zone for any of your date fields by editing the field, turning on the time function, and then choose "use the same time zone for all collaborators" and then change the time zone.
Hope this helps! If you’d like to hire an expert Airtable consultant to help you with anything Airtable-related, please feel free to contact me through my website: Airtable consultant — ScottWorld