for time period selection, pages accept "stime" GET variable. it's format seems to be YYYYMMDDHHMMSS.
it is suggested to change to unix timestamp, or support unix timestamp in addition to make constructing such in an automatic fashion urls easier.
also, current format seems suspect with timezone handling, especially dst changes. what happens if we select "missing" dst hour ? how do we get values (or which values do we get) for "overlapping" hour ?