Telling time in Dutch can be very confusing, It took a bit of practice to get there. I’ll try to keep this as simple as possible and hope that it helps.

Ik ga om 8 uur naar de bioscoop. –  I am going to the movies at 8 o’clock.

om= at

Ga jij om 11 uur naar de huisarts? – Are you going at 11 o’clock to the doctor?

van= from

tot = until/to

What gets tricky is when we start to speak about times that is not exactly on the hour. Like It is 4:37 now, so rather it is given as a relationship of times to one another.

What can be most confusing is, once you get past a quarter, past an hour, the time will refer to the coming hour, not the hour you are currently in  8:20 – Ten minutes until half 9. To understand, imagine a clock is split into 4 pieces.

Few more examples –

1:05 = 5 over 1              6:30 = half 7

3:15 = kwart over 3        4:20 = 10 voor half 5

5:25 = 5 voor half           6:30 = half 7

7:35 = 5 over half 8         8:40 = 10 over half 9