Event log show command

Hi Team,

Has anybody used the below set of commands in Cluster shell as per kb: https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_efficiently_search_the_event_log_in_clustered_Data_ONTAP ?

Events since a specific time
cm6080-rtp2::> event log show -time >=5/2/2014 08:00:00
 
Events in a specific time range:
cm6080-rtp2::> event log show -time "05/02/2014 08:00:00".."05/02/2014 09:00:00"

I tried to retrive alerts that occured 2 months back, but the result displayed only for last 2 days. Changed to advanced mode as well, but did not work. Does it work in any situation?