'latest time' is correct and can be used in both spoken and written English.
Example: "I need you to hand in the assignment by the latest time of 6 pm."
This analysis, for merely the latest time, made no sense.
The vestibular organs appeared normal at the latest time point examined, 40 weeks.
The absolute latest time for holding lotteries should be the first class session.
At that game, the Wolves support made their discontent plain for the latest time this season.
His latest, Time and Time Again, a wartime saga, came out last year.
The latest time check has the Frenchman around 35" ahead of the rest.
When is the latest time that the project can be started and finished?
I read with keen interest, therefore, the cover story in the latest Time magazine, called "Chore Wars".
In their processing, the six analysis centers which contributed to the DORIS combined solution used the latest time variable gravity models and estimated DORIS ground beacon frequency variations.
This latest time seems to take the cake.
t end The latest time at which an offence could have occurred.
