Day offset in opening_hours

I need a hint how to fix the opening_hours here:

Should the bus route be split into EB & WB?
Should the value be interval?


Do EB and WB stand for eastbound and westbound? If so I think they should be fully spelled out and in double quotes according to the description here.

If there are multiple paths used for this route under different situations then it is probably complex enough to need mapping the “PTv2” way. This involves a different route relation for each direction and each variant of the route and a route master relation to group them together into an overall 421 route. There is a (quite wordy) explanation here. This is quite involved, but would allow you to put the differing operating hours on the different directions in a way that is more likely to be understood by software.