I would like to add 30 minutes to this Liquid time attribute: {{ attributes.Pickup-Time}}

[hb7of9]

Hi There, 

⭐️ New to Liquid and this is my first post, -- have an attribute, that I would like to add 30 minutes to 🙂

The idea is to have an output of 

Pickup time between 10:00 to 10:30 🙂