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Find out which RPMs were installed on a particular date.
These would (naturally) include update RPMs.
This example shows searching for "Thu 05 Mar" (with grep).
Alternatively, pipe it to less so you can search inside less (with less's neat text highlighting of the search term):
rpm -qa --queryformat '%{installtime} \"%{vendor}\" %{name}-%{version}-%{release} %{installtime:date}\n' | less # (this example) search term: Thu 05 Mar
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If the goal is just to find which rpms were installed on a particular date it could be done a bit easier with
rpm -qa --last | grep "Tue 24 Mar"The --last option will list all rpms by %{name}-%{version}-%{release} from newly installed to oldest with the %{installtime:date} date format.