Today’s Question: For me the Date column on the Library Filter bar shows a list of all dates rather than the hierarchy you described in your answer. How can I switch to a date hierarchy view?
Tim’s Quick Answer: To switch from a flat date listing to a hierarchical listing in the Date column on the Library Filter bar, you can click the menu button at the top-right of the Date column and choose “Hierarchical” in the View section of the popup menu.
More Detail: As noted in Wednesday’s edition of the Ask Tim Grey eNewsletter, you can set a filter based on capture date for your photos on the Metadata tab of the Library Filter bar above the grid view display. The Date column can be configured to either show a date hierarchy or a flat list of dates.
With the Hierarchical option selected you can select individual years, months, or days, with the ability to expand or collapse years or months by clicking the triangle icon to the left of each on the list. With the Flat option selected you will see a list of all dates, without a hierarchy that divides the dates into years and months. This makes it a bit cumbersome to select large ranges of dates, and so in general I prefer and recommend the Hierarchical setting.
You can switch between the Hierarchical and Flat options on the popup menu accessible at the top-right of the Date column. From the same popup you can also choose whether you want the dates listed in ascending versus descending order.

