The formation of cis-trans isomers is a consequence of the absence of free rotation. Geometric isomers that only differ from each other in the 3-dimensional arrangement of the substituents in space. They have identical bonding and substituents. Alkane.
What sells out first: Christmas/New Years, Presidents Week in February, Spring Break Week in March, Easter Week and July/August sailings when the children are out of school. To get the space you want on the cruise and necessary air arrangements, don't hesitate to book 9 to 11 months in advance if possible. The remainder of February, March and April sailings usually start to fill up once the weather starts to turn cold in the Northeast and Midwest.
3. Online booking is possible up to 60 days before your planned date of travel. However, on the day booking opens (60 days before scheduled travel) you will not be able to book tickets between 8 AM to 12 PM on Bookmytrain.com. For some special trains this period may be a little less.