In a different, parallel universe, Joy Division would have toured North America in May/June 1980 and gone on to be super massive. Sadly in this world it never happened for tragic reasons but there are plenty of artefacts from the time which remind us of what could have been.
One of the many treasures in the AHW archive at the Museum of Science and Industry in Manchester is a typewritten itinerary for all the days in the trip which was planned 19 May to 10 June. Other variants exist including Detroit Bookies on 26 May (which Rob Gretton's notes in 1 Top Class Manager - which also contains further details on costings, etc - explain there was a "possibility of cancellation"). Days off were built into the schedule and the San Francisco date was to have been either the 6th or 7th of June.
You may wish to view the full typewritten itinerary (including some handwritten annotations).
Transcript
JOY DIVISION
May
19th Fly in
20th Day Off
21st New York Hurrahs
22nd New York Hurrahs
23rd New York Hurrahs
24th Day Off
25th Toronto The Edge
26th Day Off
27th Chicago Tuts
28th Madison Merlins
29th Minneapolis Duffies
30th Day Off
31st Day Off
June
1st New York Pop Front
2nd Fly to San Francisco
3rd Day Off
4th Day Off
5th Day Off
6th
San Francisco American Indian Hall
7th
8th Los Angeles Flippers?
9th Day Off
10th Fly Home
Further suggested reading: Joy Division Central