“Someday is not a day of the week”

“Someday is not a day of the week” is a saying that has been printed on many posters. If something is schedule to be completed “someday,” that often means “never.”
 
“The first step in achieving your goals is to recognize that ‘someday’ is not a day of the week” was said by Ed Bliss in his audiobook, Getting Things Done (1978). American author Janet Dailey (1944-2013) is often incorrectly credited with the saying. Denise Brennan-Nelson, author of Someday Is Not a Day of the Week (2005), is also frequently (and incorrectly) credited with originating the saying.
 
       
OCLC WorldCat record
Getting things done.
Author: Edwin C Bliss
Publisher: Sunnyvale, Calif., Edwin C. Bliss & Associates, 1978.
Edition/Format:   Audiobook on Cassette : Cassette recording : English
 
30 September 1983, The Register (Santa Ana, CA), pg. A6, col. 2 ad:
Someday is not a day of the week…
...stop in today and see…
(Leather & Lace.—ed.)
   
Google Books
Shorthorn Country
American Shorthorn Association
1986
Pg. 89:
Thought for the month: The first step in achieving your goals is to recognize that “someday” is not a day of the week.
 
Google Books
CareerTracking:
26 Success Shortcuts to the Top
By James Calano andJeff Salzman
New York, NY: Simon and Schuster
1988  
Pg. 214:
“The first step in achieving your goals is to recognize that ‘someday’ is not a day of the week ”
—ED BLISS, GETTING THINGS DONE
 
Google Books
The Educator’s Book of Quotes
By John Blaydes
Thousand Oaks, CA: Corwin Press, Inc.
2003
Pg. 125:
Someday is not a day of the week. —Author Unknown
 
OCLC WorldCat record
Someday is not a day of the week
Author: Denise Brennan-Nelson; Kevin O’Malley
Publisher: Chelsea, MI : Sleeping Bear Press, ©2005.
Edition/Format:   Book : Fiction : Primary school : English
Database: WorldCat
Summary:
When asking to go on various outings, Max always receives the answer “Someday” from adults, but with a little help from the days of the week, he discovers where “Someday” lives.
 
Twitter
yumi ☆ ゆみ
‏@ygjumi
“The first step in achieving your goals is to recognize that “someday” is not a day of the week.” Ed Bliss
10:30 AM - 14 Aug 2011
 
Twitter
Dean Jones
‏@jajones_ferrum
I should save this for a Monday. “Someday is not a day of the week.” Janet Dailey
#SuccessfulStudentsFocusSooner
#YouGotThis
10:36 AM - 3 Oct 2014
 
Twitter
DeputyChief Villegas
‏@ChiefVillegas
“Someday is not a day of the week.”
~Denise Brennan-Nelson
#MotivationMonday #MotivationalMonday #inspirational #quote #motivation
5:00 PM - 6 Oct 2014