premise: Our goal for the day was to make it without sleeping until 6 pm local time , which was quite a struggle . We were unable to get into our rooms until 2 pm , but due to our perserverence and the realization that we would only prolong the jetlag if we gave in , we valiantly made it until 4:30pm before lying down . We slept all night , woke up around 7:30am this morning , and I think we 're good to go . Today we plan to see the Dublin Castle , and take a double decker bus tour of the city . Why did they try not to sleep until 6 pm ?
hypothesis: Because they wanted to adjust to the time at their new location .