Oh-Kay Yogesh Thapa,
48 hours is more than ample time allowed for you to disclose
any watch make or model...
Sans any such information
answer is the best we can do...
cases... You can adjust your day/date
by finding the "middle" position of your stem:
Full position is all the way (gently) extended
WHERE YOU CAN SET TIME
Push the stem half way in and roll the
stem in that position...
should start advancing...
Instructions for my HEUER Monaco
(real one) has no such mechanism.
On that watch you must spin the hours "PAST MIDNIGHT" repeatedly (from before 9pm past 1 am... and back).
On the Concord Impressario
... Date is easy but
month & day
(woooh)... I ought to get out the instructions...
The old TIMEX (chronograph)... definitely time for
(unmanly art of reading) the instruction book.
Hope this helps
Carnac the Magnificent