The only persons who will be entitled to enter the CERN site during the end-of-year closure are those who are required to perform essential or emergency work.

This year, CERN will be closed from Saturday, 23 December 2017 to Sunday, 7 January 2018 inclusive. The first working day of the new year will be Monday, 8 January 2018.

As is the case every year, the only persons who will be entitled to enter the CERN site during the end-of-year closure are those who have received authorisation to do so for strictly professional reasons such as stand-by service and indispensable maintenance work.

Each department and, in particular, each experiment’s technical coordinator, is responsible for compiling a list of the people in receipt of such authorisation by Friday, 22 December 2017 at the latest.

Any members of the personnel of outside companies who are required to work on the CERN site during the closure must also have a valid AET (notice of work done outside normal working hours) and thus must be included in the relevant department’s list.

During the period when the Laboratory is closed, i.e. after 22 December, anyone who needs to enter the CERN site for an urgent reason and without the prior authorisation of her/his department or her/his experiment’s technical coordinator will be obliged to submit an access request (select the “XMAS-2017” permission) that will have to be signed by the CERN Control Centre (CCC) or the Security Service. The “XMAS-2017” permission option will not be available in the ADAMS system prior to 23 December.

You are also kindly asked to note that all CERN services (including the restaurants and the library) will be closed during the end-of-year closure.

We thank you for your cooperation and wish you a very happy end-of-year holiday!

The BE and SMB departments