The phrase "average dates of the" is correct and usable in written English.
It can be used when discussing typical or mean dates related to a specific context, such as events, occurrences, or data points.
Example: "The average dates of the project milestones were crucial for planning the timeline effectively."
Alternatives: "mean dates of the" or "typical dates of the".
And although temperatures below freezing are not uncommon into the first half of April, the average date of the last freeze is quickly approaching inside the Beltway.
The average date of the spring thaw is eight days earlier than it was in the 1920s; Alaska has a week less winter.
Over the past 10 years, the average date of the District's first 75-degree temperature was March 15, which means our "early" warm spell of the past two days was actually right on time.
As you go west and northwest of the District and the beltway (e.g. towards Rockville, Leesburg, and Frederick), the average date of the last freeze extends into mid-and-late April.
The average date of the last freeze in Washington D.C. (at Reagan National Airport and its predecessor location at 24th and M St). is from around this time to early April.
The first seeds go into the ground about a week before the average date of the last killing frost, in the middle of May in the Hudson Valley, where I live, or when emerging oak leaves are about the size of mouse ears (conventional garden wisdom that I do follow) anywhere.
The average date of the first named storm in the Atlantic is July 9, so even if we discount pre-season Alberto, we won't really fall behind in storm activity for a few more weeks.
The average date of the advent of monsoon winds in Delhi is 29 June.
This was over a month earlier than the 1966 2009 average date of the first named storm, July 9.
The average dates of obtaining samples for DNA and antibody testing were 8 and 2 days before transplantation, respectively.
