This is to be compatible with different Cron formats. Again this is the part of the underlying Cron library I chose (because it has year support). It's to do with supporting 5, 6 or 7 part Cron formats.
E.g.
- if there are 5 parts, its minutes
m h md m wd
- 6 parts considers the 1st part to be seconds
s m h md m wd
- 7 parts considers the last part as year
s m h md m wd y