Argonne National Laboratory, including the Center for Nanoscale Materials (CNM), is closed on the following holidays.

Holiday Schedule

Holiday	2023
New Year’s Day	Monday, January 2
Martin Luther King Day	Monday, January 16
Memorial Day	Monday, May 29
Independence Day	Tuesday, July 4
Labor Day	Monday, September 4
Thanksgiving Day	Thursday, November 23
Day after Thanksgiving	Friday, November 24
Christmas Eve	Friday, December 22
Christmas Day	Monday, December 25
New Year’s Eve	Friday, December 29

Winter Break

Beginning December 21, 2023, at 5:00 pm CST and will reopen on January 2, 2024 at 7:00 am CST. The CNM suspends user operations during this closure; neither the CNM building nor CNM staff, including administrative support, is available to users at any time during the winter break.
 
The winter break will be followed immediately by a preventive maintenance period for a week to be determined in January 2024. During this period some capabilities may be unavailable at times and the servicing of some infrastructure systems may affect operations. More information will be sent to the user community as the date nears.