My phone shows the wrong time and date, how do I reprogram it (I have no manual) sorry, its a Nortel Networks NT8B27JAAA..

usually the admin password is left at admin (23646)

You should complete programming on a T7316, T7316E, M7310, M7324 phone.
1. Feature **23646
2. Password: 266344
>>>Your password may have been changed by your phone company. Contact them for the password.
3. Select General Admin
4. Select Date and Time
5. Select Time
6. Adjust the Hour, Minute, and AM/PM
7. Press Rls when done

check the manual for it or get that info on the net

how can I change time and date from the phone?

you may contact the service provider........

well you can go to the nortel site where they have an online service where customers can register and get the help needed here is the link http://support.nortel.com/go/main.jsp?cscat=SELFSERVICE

Programming is done on 7310, 7324 and 7316 type sets.
Enter programming by pressing the feature key followed by **266344.When prompted to enter the password enter 266344.
The screen should say A. Configuration. The 4 top line/feature keys are now used for programming.
Press "NEXT"(bottom right arrow)
display should read B.General Administration.
Press the show key (top right arrow)
display should read 1.speed dial
Press the next key 2 times(bottom right arrow) .
display should say 3.time and date
Press the show key (top right arrow)
display should show current programmed time
Press the Change key
Enter in time in 12 hour format
press ok
press either Am or PM when prompted
press ok
press the Rls key when finished

Step 1
Press the FEATURE key followed by **8463
Password Retry Step 2
Press 266344 on the dial pad buttons to enter the DEFAULT password. Your password MAY BE DIFFERENT! The display will show the following options:
Hour: 01 Next Change Step 3
Select CHANGE - the display will show the following options:
Hour: __ Cancl Step 4
Use the dial pad buttons to enter the hour. You must use two digits for all hours (i.e. "08" for 8 o'clock). You will be prompted to enter AM or PM. Select CHANGE and OK to choose PM. AM OK Change Step 5
After you have entered the hours, select NEXT. The display will show minutes as 00. Use the dial pad buttons to enter the minutes. If you are just changing the time, press the RELEASE (RLS) button to end your session. The time will be changed and the date will remain the same.
If you want to change the date, select NEXT.
Minutes: 00 Next Change Step 6
The display will show 99 as the year. Using two digits, enter the year using the dial pad buttons (i.e. "05" for 2005).
Select NEXT, and repeat to change the month and the day.

Year: 99 Next Change Step 7
Once you have entered the day, press the RELEASE (RLS) key to end your session. This will save the changed time and date.

Sorry, the tester012 was an accident, so I wanted to repost in case there were more questions on this.

The answer still stands for most Nortel PBXs:
To set the time and date of your system you program in load 2:
Step 1) LD 02
Step 2) STAD "Day Month Year Hour Minute Second"
i.e. STAD "24 11 1976 15 41 49" =
November 24th 1976 3:41pm 49 seconds"
To test it...
Type: "TTAD" - (this tests time and date)

But I also wanted to clarify that it is in the manual, but since there are multiple manuals with a Nortel PBX, that you need to look in the LD (or Loads) in them. This particular one is found in LD 02.

Another site to check out for a crash course in LD for Nortel (in case you have similar issues that you need assistance on) is this one here:
http://www.pbxinfo.com/meridian-systems/16288-meridian-crash-course-programming-guide.html

I hope this has been helpful, again I am sorry for not having logged in properly to be notified on more explanation when I posted Solution #1.