```ruby
# Days that are always excluded from availability
EXCLUSIONS = [
  Date.parse('29/05/2017'),
  Date.parse('28/08/2017'),
  Date.parse('25/12/2017'),
  Date.parse('26/12/2017')
].freeze
```

Exclude guider days from bookable slots
user
```ruby
# Days that are always excluded from availability
EXCLUSIONS = [
  Date.parse('29/05/2017'),
  Date.parse('28/08/2017'),
  Date.parse('03/10/2017'),
  Date.parse('04/10/2017'),
  Date.parse('25/12/2017'),
  Date.parse('26/12/2017')
].freeze
```
assistant