5.67 events planned in the past

The past continuous can be used to refer to events planned in the past, especially with some common verbs such as 'come' and 'go'.

5.68

The simple past of 'be' can be used in structures used to express future events, such as 'be going to', 'be about to', and 'be due to'. The implication is usually that the expected event has not happened or will not happen. For more information on 'be going to', see paragraph 4.237.