Account Update 'outboundAccountPosition' 'Event Time' vs 'Time of last account update'

Can someone give me a more detailed explanation on the difference between ‘Event Time’ and ‘Time of last account update’ that are part of the Account Update ‘outboundAccountPosition’ listed here: [](https://Account Update)

e.g. if I place a Buy order and then the order is Filled - when do I get ‘Event’ vs ‘Time’ updates?


Event time

Corresponds to the time the outboundAccountPosition event was pushed to the client.

Time of last account update

The recorded time of when the account was last updated internally.