Here is an alternative solution using Power Query. Your profile indicates you are using O365. Please update your profile to reflect your proper version.
let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type date}}),
#"Grouped Rows" = Table.Group(#"Changed Type", {"Name"}, {{"Start", each List.Min([Date]), type nullable date}, {"End", each List.Max([Date]), type nullable date}})
in
#"Grouped Rows"
Power Query is a free AddIn for Excel 2010 and 2013, and is built-in functionality from Excel 2016 onwards (where it is referred to as "Get & Transform Data").
It is a powerful yet simple way of getting, changing and using data from a broad variety of sources, creating steps which may be easily repeated and refreshed. I strongly recommend learning how to use Power Query - it's among the most powerful functionalities of Excel.
- Follow this link to learn how to install Power Query in Excel 2010 / 2013.
- Follow this link for an introduction to Power Query functionality.
- Follow this link for a video which demonstrates how to use Power Query code provided.
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