Timing for Delivery issues

Hi, thanks by your time and your response.

By other side, there is a problem with the timing. When an user enter for doing an order, imagine for example, at 19.35, in the form for selecting the hour for delivery, user can select “19.30”, and this timing is impossible… how can I fix this?

Yes, there was a mistake on the configuration at the time zone for WordPress, now I changed it to my timezone, and this is fixed and working fine.

By other side, I would like to change the time slot. now is like:
12.00 – 12.30 – 13.00 – 13.30 (…)
And what I need is some like:
12.00 – 12.15 – 12.30 – 12.45 – 13.00 -13.15 (…)

Reading another topic at this forum, I read this:

If you want to change the interval then you can use the order time interval extension on restropress.com.

Reading this I understand that I need this plugin for working this way I explained.
Tell me if I get this plugin, named “Order Time, Intervals & Limits”, Restropress is going to work like:

EXAMPLE 1
– TIME INTERVAL: 15MIN
– Cooking Time: 45MIN
– SLOTS: 12.00 – 12.15 – 12.30 – 12.45 – 13.00 -13.15 (…)
– Actual Time: 12:00
User will see this slots: 12.45 – 13.00 – 13.15 – 13.30 (…)

EXAMPLE 2
– TIME INTERVAL: 15MIN
– Cooking Time: 45MIN
– SLOTS: 12.00 – 12.15 – 12.30 – 12.45 – 13.00 -13.15 (…)
– Actual Time: 12:10
User will see this slots: 12.45 – 13.00 – 13.15 – 13.30 (…)

Thanks by your time!