Single email to clients of deadlines for next 3 to 5 years

We are thinking about sending one email to a client with deadlines for submission of  information for the next 3 may be 5 years. This would deadlines for VAT, year end accounts and SA100.

We would ask clients that they should put the dates in their diary and further reminders will not be sent. Further, we will say that if the information if the info is not  received on time, submissions deadlines with HMRC and Companies House may be missed. We will say it in a better way than this.

This would cut down on admin. We are not sure how clients would take it and whether this would work.

We are looking for feedback on this idea/procedure.

Thanks