Afternoon Tea is served in the afternoon, typically around 3pm, whereas high tea is served around 6pm. Afternoon Tea is meant at a 'put you on' between lunch and dinner. High tea is an early dinner and was originally served to workers coming home in the early evening. It was served from the high counter top in the kitchen, hence the name. The food at each is also different. Afternoon tea is delicate tea sandwiches and mini desserts. high tea is more savory pies and cakes. I have noted here in the US people like to have
tea early around noon or 1pm, in England tea time starts a little later then you just have to decide if you prefer Afternoon Tea or high Tea?