Русско-англо-русский юридический словарь

“You must pass your exam no later than the end of this month”

“The goods must be shipped no later than August 1st”

“The work should be completed no later than noon tomorrow”

“You should make it here no later than by 7 pm”

“You must arrive to work no later than 8:30 am to start your shift if you want to get paid in full”

“You must finish the job no later than tomorrow to avoid any further delays”

“The contract must be renewed no later than its expiration date” (incorporated.zone)

• Copy for inclusion should reach the Editor not later than 14 February 1994.

• Nominations must be supported by three members of the National Trust and must reach the Secretary not later than 15 June.

• I have circulated the request to the various Regional Council service departments asking them to respond not later than 18 December 1992.

• Nominations should be sent to the Director-General to arrive not later than 30 November.

• Bookings made less than four days in advance must be paid for not later than fifteen minutes before the performance. (Longman Dictionary of Contemporary English)

No later than is used more often than not later than, and it is less formal. Not later than is used mostly in formal documents, such as rulebooks, government laws, and academic papers. (Merriam-Webster Learner's Dictionary)

"no later than" or "no later than on" correct?

"No later than on" sounds very clumsy to me. I don't believe that the "on" is required for any meaning.

"no later than Thursday 6 May" includes Thursday.

I agree "on" is redundant, it doesn't add anything it just makes the sentence awkward. (UsingEnglish.com)