I'll be going to Hong Kong from 25 March to 5 April, any advice on dressing?

Hi, it will be warm in Hk then, with the temp ranging from 18C to 26C. I suggest you take along both long-sleeved and short-sleeved shirts and some spring clothes. Somtimes, it may also rain a little, so you may also need to prepare simple rainy gear.

Generally HK welcome many tourists throughout the year. Personally thinking, late March to early April is relatively peak season, when there are many shopping malls giving discount.