When looking at closed alarms in Operator Console and sorting by closed date. There are several alarms with a closed date of 12/31/1969 or 1/1/1970, depending on the server timezone. The UIM database is Oracle.
Release : 20.4
Component : UIM NAS
NAS 9.36T1 and versions after resolves this.
The fix will not correct the 1969 timestamp unless alarm updates are processed.