If the subject is the (end times). What would be the difference between the following:
- At the end of the (end times)
- By the end of the (end times)
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The use of by allows the person performing the task to complete it any time up until the specified time.
The use of at specifies the exact and only time the task must be completed.
"I want my will updated at the end times" - Exactly at the end time, not a minute sooner or later.
"I want my will updated by the end times" - Before the end time.