I have the exact same problem.  Last December 31, 2020 I was doing the cheque for the rent dated January 1, 2021 and it kept giving me an error message.  So I dated it December 31, 2020.   Today when I advanced the date, it read must be between 01/01/80 and 01/02/21, however the date is 01/02/21 and the error keeps flashing and I could not do any reports.   Similarly, backing the date to December 31, 2020 is all fine.  

We will need a solution to this.  Anyone in Sage??

Bank reconciliation works for 2021.  Any kind of report doesn't. 

I tried to start a new year, backed-up the date beforehand.  Even in the new fiscal year 2021 does not work, so I restored from backup.  No need to try that option, it didn't work. 

Dimery,

What version of the program are you using?

What are your date settings under Setup, Settings, Company, Information?

Have you activated the option Setup, Settings, Company, System, Do not allow transactions dated before xxxxx?  If so, what date is there?

Do you have the Allow transactions in the future option turned off on the same dialog?

Edit: What date format are you using in Sage 50 and what date format are you using in Windows?

Aaron,

You can't post-date Payables entries past the Fiscal or Calendar year ends without starting the new year first.  That is why you got the original message when you tried to use Jan 1/21 when your session date was still in 2020.

For the 2021 issues, the same questions I posted for Dimery may help sort out your problem.  I've edited the original post I sent and added a new question.

Also can you activate four-digit years in Sage 50 and let us know if the century is still 20xx in the messages?

One more.

Also can you activate four-digit years in Sage 50 and let us know if the century is still 20xx in the messages?

I'm using 2018 Sage 50 Premium.  I have allowed transaction beyond the session date.   I'm using the same date format in Sage as in Windows.  I have already read the forums to go into Windows Control Panel date and time settings.   I tried calling sage but they are closed today.  I'll keep you posted if I manage to fix it.  Right now I cannot even issue invoices, everything is backdated to December 31, 2020.

How do you do this?  Settings?

Setup, Settings, Company, Date Format.

Yes, I've done that, already MM dd yyyy, 4 digits.  

Oh wait, after changing the date for the long format, it worked.  Thank you Mr. Ridings!  Happy New Year.  

worked for me too!!!! Thank you!!

Great, glad you both have it working.  Now for greater clarity because I am expecting a lot of other people to have the same issue, can you define what you mean by

Aaron Kent said:

after changing the date for the long format

See the image below.  Are you talking about the Short Date format with a four-digit year or are you really talking about the Long Date Format in the image below?

Need to go to settings, setup, company, date format,  then in both dates, long form and short form, both have to be four digit year yyyy.  That should do it. 

I followed your instructions;

1. Settings

2. Company

3.Date Format

4. Changed Long date from 01/01/2021 to 01 JAN 2021

5. changed both screen use and report use to "long dates" as well.

My screen looks different then yours but my program is probably older. 

The image I posted is the date formats in Windows, not Sage 50.  If you didn't change anything in Windows, that's ok.

My problem is that I can't replicate your issue so I can't tell Sage what might be causing the problem so they can fix it however there are others with the same problem over the last couple of days.  The Long Date format can never be 01/01/2021 as you have indicated.  By definition, Long Date includes the words for the month.  I don't know if you were using MM/dd/yy for your short date or dd/MM/yy for it.  If you are running an older version, then that might have been good information to give us so we can help you.  Sage will not update older versions for this kind of thing.

What is your Windows date formats according to your Regional Settings in the Control panel (similar to the image I posted above)?

This set up below currently works on Sage 50 Pro 2021.1 with a session date of Jan 1, 2021, latest transaction date of Jan 7, 2021.  My system is Win7Pro so it may be a Win8, 8.1 or 10 issue if it's happening in the 2021 version.

I did not change anything in windows

Now that I know about the older version issue, I just tested 2013.4 and found the same issue you have with two digit years.

Richard S. Ridings said:

Also can you activate four-digit years in Sage 50 and let us know if the century is still 20xx in the messages?

When you change to a four digit year while the Sales Invoice is still open, the year of the date switches to 1921.  When clicking on the calendar, I get 2020, not 2021.

I tried to test a new file in Sage 50 2020.3 but it will not allow me to create a new company on my computer without crashing.  I cannot test this version.

I created a new file in 2019 and it allowed me to post without problem, so the issue is definitely with older versions of the program and Sage has already corrected it in the newer versions.

Edit: when I switched the 2013.4 file to four-digit years, it will post with the correct date, even if dated in the future part of the year past the session date.

OK thanks.  I should also mention that we had already posted entries in our office in 2013.2 and never saw the issue because we run all our files on four-digit years which I believe is the default setting.

Thank you so very much for posting this.  It worked after Sage told me I had to buy new software!!

is your date format yyyy MM dd

I made it all the same MM dd yyyy for both the long format and the short format.