null date detected; date value reset to 1-Jan-1980 Facility: EFI$CP, The OpenVMS EFI Partition Control Program Explanation: A null date value has been detected, is considered illegal, and has been repaired. The Windows epoch date 1-Jan-1980 has been substituted. This message is the non-fatal version of the BADDATE error, and is used when MOUNT/IGNORE=CORRUPTIONS is requested. User Action: The FAT volume is providing a null date value. Short of contacting the vendor and/or reworking the software that created the FAT volume data structure(s) involved, there are comparatively few options available.