Complex sentence: Dublin mean time was set 25 minutes behind London time, although it came into line with international standard time in October 1916 when summer time ended, and most railway clocks were adjusted by 35 minutes rather than one hour.
Split into simpler sentences: Dublin mean time was set 25 minutes behind London time, although it did come into line with the international standard time in October 1916 when summer saving time ended. On this date most railway clocks across Ireland were adjusted by 35 minutes rather than one hour.