You can apply for part-time pension only until the end of 2016. Partial old-age pension will take over from part-time pension. The new type of pension will be more flexible because you can choose how much you want to work, or stop working completely, as you wish. You can apply for partial old-age pension as of February 2017.
If you are on a part-time pension, you can still keep receiving it. Remember to look into how the part-time pension affects your income and other aspects of your life.