The given date was a Tuesday.
That will depend on what day of the week the 1st of April is on. Whatever day of the week it is on, if you are taking the 8th of April as being 7 days later, then it will be on the day of the week after the day of the week of the 1st of April. So, for example, if the 1st of April was on a Saturday, then the 8th of April would be on a Sunday.
17 April 1997 was a Thursday.
April 2, 1997 was a Wednesday.
April 15 1997 was a Tuesday.
April 29th 1997 was a Tuesday.
April 23, 1997 fell on a Wednesday.
April 25, 1997 fell on a Friday.
April 8, 1997 fell on a Tuesday.
April 3, 1997 fell on a Thursday.
Saturday
It was a Monday.
Friday.