French Postmark Last Century - How To Read To Get Date?

Hi - asking on behalf of a friend writing the biography of Irene Mawer. What date is indicated on this postmark, please?

Jan 1 1927

I see that Miss Mawer attended the same school as my daughter.

Try July 13, 1927. Poorly impressed "7" for month.

Broadly, various countries, hand-stamps, and cancelling machines have different arrangements of the date/time elements. It take some practice with each of these. Many countries place the elements in increasing time order and have the day before the month, which confuses a lot of U.S. collectors.
It is also good practice to examine the entire mail piece. Are there other postal markings? Is the message dated? Does the message give a clue? Etc.

I agree with Vayolene.
The time of day is in the top line as 11:20
The second line is the day and month. Clearly the 13th day, but could the diagonal of the month might be a "7" for July with the top bar not imprinting, rather than a "1" for January? (Add: as michaelschreiber was writing at the same time!)
This is where examining the item in its entirety may reveal the answer.
The bottom line is the year of 1927.

Add: And although not evident in this case, the month is frequently in Roman numerals, so one has to be sensitive to differentiating:
II = February in Roman numerals
II = November in English

That's great!

From my friend "Wow! I am grateful to everyone who replied. 1927 is good enough for me. Thank you so much, everyone."

Agree likely 7 not 1.