Dell Precision M2400 (Mid 2008) - Manual (Page 24)

Set PRTC
Enter PRTC in GMT (UTC) format (YYYY:MM:DD:HH:MM:SS). Valid date range is 1/1/2004 – 1/4/2021. Setting PRTC value is
used for virtually maintaining PRTC during power off (G3) state. This configuration is only displayed for the Enterprise
Provision Model.