For more precision:
Each year is 1 week. We did that so people could accurately schedule weekly events around the same in-game day/night cycle. But, we didn't want consistency in the day night/cycle from day-to-day (just week-to-week) because people who consistently log in each day would always see the same time of day. (That's bad). So we knew we needed something not evenly divisible by 24 hours to ensure the day/night cycle drifted each day.
In the end, we did lots of math and lore stuff and came up with 60 days per year in Elyria, broken up into 6 months of 10 days. That means each day in Elyria (EL) is 2.8 hours (RT). That means there are 10 EL days (1 month) every 28 RL hours.
Now... we knew there would be an EL day every 2.8 hours, now how to break it up? We knew we wanted a ratio of roughly 1.8:1, to ensure there was more daylight than nighttime, but we also needed twilight.
In our world there are 18* of angle below the horizon, between the time of sunset/dusk and dawn/sunrise. So we used that as a starting point. So if the 2.8 hours (168 minutes), 18 minutes on either side is twilight. That leaves 132 minutes remaining per day to split between daylight/nighttime. Attempting to preserve the 1.8:1 ratio came up with numbers that weren't quite to our liking. So we fudged them a couple minutes in order to come up with the following nice pattern:
86 : 46 : 36.
Each Elyrian day there are 86 RL minutes of daylight, 46 RL minutes of nighttime, and 36 RL minutes of Twilight (split into 18 x2).
And de food will decay even if we are offline. The world is always persistent.