Answer:
Emma and her friend go to Langdale on June 25th
Explanation:
Emma buys the tickets on the 19th June. It´s Saturday, the next Friday will be June 25th
Monday 1st 8th 15th 21st 28th
Tuesday 2nd 9th 16th 22nd 29th
Wednesday 3rd 10th 23rd 30th
Thursday 4th 11th 17th 24th
Friday 5th 12th 18th 25th
Saturday 6th 13th 19th 26th
Sunday 7th 14th 20th 27th