that document is outdated; it only counts for the time conversion of weekdays, being 4x speed, excluding the 6x speed on weekends.
we can conclude that the average time speed, including weekdays and weekends
= ( 4 x 5 + 6 x 2 ) ÷ 7
= ~4.57 speed
therefore, a whole OOC month would convert to 4.57 months or ~139 days ICly
don't judge my random overcomplication of the subject, im simply bored