Whittnauer , 10C01 Crown does not double click, so I can't set day and date.

read the instruction manual, Geneva Watches with Two or Three Hands

1. Pull the crown out until you feel a click.
2. Turn the crown counterclockwise until you have the correct time.
3. Push the crown back in to set the time.

Geneva Watches with Two or Three Hands and a Date Window

1. Pull the crown out until you feel two clicks. This second click position allows you to set the time.
2. Turn the crown counter clockwise until you have the correct time. Push the crown all the way in to set the time.
3. Pull the crown out until you feel one click. This first click position allows you to set the date.
4. Turn the crown counterclockwise until you have the correct date. Push the crown back in to set the date.

Multi-Function Geneva Watches

1. Pull the crown out until you feel two clicks. This second click position allows you to set the day.
2. Rotate the crown counter clockwise until you have the correct day. Push the crown in to set the day.
3. Pull the crown out until you feel a second click to set the time or the 24-hour hand.
4. Turn the crown clockwise until you have the correct time, then push the crown in to set it.
5. Pull the crown out just one click to set the date. Turn the crown clockwise until you have the correct date, then push the crown in to set it.

Geneva Chronograph Watches

1. Pull the crown out two clicks. This second click position allows you to set the time.
2. Turn the crown clockwise until you have the correct time, then push the crown in to set it.
3. Pull the crown out just one click to set the date. Turn the crown clockwise until you have the correct date, then push the crown in to set it.
4. Stop and start the chronograph by pressing the PA button, located above the crown.
5. Reset the chronograph by pressing the PB button just below the crown. The PB button returns the chronograph second and minute hands to their original positions of zero.

Automatic Geneva Watches

1. Wind the mainspring by turning the crown 15 to 20 times clockwise.
2. Pull the crown out until it clicks.
3. Turn the crown counterclockwise until you have the correct time, then push the crown in to set the time.

Tips & Warnings

• Do not set the date or time between 8 p.m. and 3 a.m. to avoid damage to your Geneva watch. The gears sit too close together during these times.
• If your Geneva watch becomes wet, wipe it dry as soon as possible. Keep your watch away from saunas and hot tubs, as the extreme heat diminishes the watch's water resistance.

Read more : http://www.ehow.com/how_6134550_set-date-time-geneva-watch.html

Unscrew crown. Some models of Sector Sport watches may have a screw down crown. Watches meant to be used in water will often have this feature. To test this try spinning the crown freely in both directions. If it does not spin freely it has a screw down crown. If your Sector has a screw-down crown, turn it in a counter clockwise motion to unscrew it until it pops free.

Pull crown out one click and set date. If the watch has a date perform this step, if not move on to the next step. Pull the crown out one click. Twist crown clockwise and counter clockwise to set the day and date to the previous days day and date. The purpose of this is to set the date by setting the time and insuring the watch is in the correct a.m. and p.m. mode.

Pull crown out to the next click and set time. Pull the crown out the to next click. This is the time setting mode. Set the time by turning the crown clockwise until the day or date changes to the current date. This is the a.m. mode. Continue to the correct time. If it is a p.m. time this will require moving one full circuit of the dial past the twelve again and then to the correct time. If you fail to do this, the date will change at noon. If there is no date, simply set it to the correct time.

Push in and screw down crown to retain water resistance. Push crown down into its furthest setting. If it is a screw-down crown, press the crown in with a finger and twist it clockwise. Be careful here not to cross thread the crown in the crown tube or it will need to be replaced. It should be smooth and easy to turn. If any pressure or resistance is felt stop and start over. If you fail to screw in a screw down crown your Sector Sport watch will not be water resistant.

To set a basic wristwatch, simply pull the crown (the winder button at the 3:00 position on 99% of watches) out gently - it will click into adjusting position. Wind to send time and then push back in again.

Variations on this are: If you have a watch with date display, the crown will have 2 positions, the first click will be to set the date and the second click (fully out) is to set time. If you need to adjust the date, I suggest you wind the date to the day before you need and then use the second click to wind the hands to the correct date. This way you will be able to know if you have the hour at a.m or p.m position and avoid it have the date changing during the day instead of at night.

One last variation for wristwatches is a screw down crown. Some water resistant and sports models incorporate an added feature whereby the crown is threaded so it can be tightened down to avoid water entering - the most common place water gets into a watch! If you have one of these, you simply need to screw the crown anticlockwise until it pops out and then refer to the instructions above. Don't forget to push and screw the crown back in clockwise when you are done

To set a basic wristwatch, simply pull the crown (the winder button at the 3:00 position on 99% of watches) out gently - it will click into adjusting position. Wind to send time and then push back in again.

Variations on this are: If you have a watch with date display, the crown will have 2 positions, the first click will be to set the date and the second click (fully out) is to set time. If you need to adjust the date, I suggest you wind the date to the day before you need and then use the second click to wind the hands to the correct date. This way you will be able to know if you have the hour at a.m or p.m position and avoid it have the date changing during the day instead of at night.

One last variation for wristwatches is a screw down crown. Some water resistant and sports models incorporate an added feature whereby the crown is threaded so it can be tightened down to avoid water entering - the most common place water gets into a watch! If you have one of these, you simply need to screw the crown anticlockwise until it pops out and then refer to the instructions above. Don't forget to push and screw the crown back in clockwise when you are done

Crown(stem) at 10 O'clock has air inlet for temperature, does not move. Crown at 8 O'clock is for setting 3rd time zone next to it. The two buttons on the right of the case, above and below, set 2nd time zone which is at the 6 O'clock position of the large dial. To set #2 push top button till min. hand moves 1 min., then push bottom button to move 1 min each time or hold for rapid movement. Large crown sets date and large dial. Unscrew it (counterclockwise) then pull out to first click, then set date turning crown clockwise, continue to pull out till 3rd click which is where you set the time on the large dial.

Thank you for contacting FixYa.
Pull the crown out to position No. 3, turn clockwise to go to hour and minutes hands; the small dial showing days of the week will move, and the 24-hour dial will also move correspondingly.To set the date, pull the crown out to position No. 2 and turn clockwise until you have set the desired date; push the crown back to position No. 1.

Multifunction watch:Pull the crown out to position No. 3, turn clockwise to go to hour and minutes hands; the small dial showing days of the week will move, and the 24-hour dial will also move correspondingly.To set the date, pull the crown out to position No. 2 and turn clockwise until you have set the desired date; push the crown back to position No. 1.

Alhamdulillah, the problem solved (at last) tks to IRONMAN (http://www.fixya.com/support/t579677-instructions_mens_festina_watch_16095#SameProblemContinued)

The steps are like this :
1. Pull the crown full, and turn it clockwise until you find the right day.
2. and then push it one click (dont push it to hard so it back to normal position) and turn the crown counter clockwise to adjust date.
3. Push the small button near the crown to adjust month.

and voila... the problem solved

if all else fales, you are probably in need of a service.

The manual explains it clearly From here http://www.citizenwatch.com/CUK/English/settingsresults.asp?caliber=e870