Dear Annika,Thanks for your prompt reply.
1.We will be landing on 26th @Zurich and head to Interlaken directly by train and hope to arrive by 5 pm. Stay for 3 nights,There won't be much to do on that day, advice any small activity or a walk around the town if possible thereafter.
2 . 27th May,We cover Zermatt and Matterhorn on next day that will be actually Day 1.
3.28th May, Day 2 we do full day Jungfrouch.
4. 29th May,we move to Lucerne on Day 3 dump our bags in hotel and straight away go for mount Pilatus as our Pilatus vouchers are valid till 29th May only.
5. 30th May,Day 4 for adventure activity Jetboat etc. and local trips. we can cover this from Lucerne as Interlaken is not very far to commute
6. 31st May,Day 5 for Engelberg and Titlis ,evening for Lake Lucerne.
7. 1st June,Day 6 We move to Zurich checkin and thereafter as you suggesed Full day Golden pass along with Geneva.What time we take the Golden pass to reach Geneva ,do we have to change for Geneva after Montreux?Is it possible to cover all this in a day?
8.2nd June, Day 7 for local Zurich town.
9.Day 8 ,Early morning departure back from Zurich.
Lastly I think we might have to drop Glacier express for time constraints, is it a must do?
We are doing all these Mountain trips- Jungfrouch, Titlis, Pilatus and Zermatt along with Matterhorn.Are these almost same and are they advisable to be done in our itinerary? Can we do either Jungfrouch or Titlis if there's not much difference. kindly review the above itinerary again and advice accordingly