The flag icon shown here is a timeline flag; it is filled in with black indicating that it is in the timeline; but a search fails to find it. This is true of several of the events listed for Sarah.
Not all Biblical events map to a timeline event with the same name. In this case, the timeline event(s) you are looking for are "Life of Isaac (Early)" and "Life of Isaac (Late)".
Probably the easiest way to find this connection is via Factbook.
From the Topic Guide, click "Isaac is born" to take you to the Factbook entry for that event. From there, click on the hyperlink in the header with the date range (hovering indicates the name of the event) to go the the entry in the timeline.
Thank you ... but I thought that in the old timeline, the names did match. Is my memory failing me?
I'm not certain whether or not that was always the case.
