Sunday Rock Concerts flyer
The flyer advertises Generation X plus The Jolt for “this week April 2, 8 p.m.” and says “next Sunday” Siouxsie & The Banshees.

What the flyer can establish
The flyer gives the day and month but does not print a year. A matching surviving ticket in the archive explicitly dates the Generation X / The Jolt booking to Sunday 2 April 1978. Read together, the flyer and ticket support the 1978 identification.
“Next Sunday” places the advertised Siouxsie & The Banshees booking one week later, on 9 April. The 1978 Sunday sweep already lists that booking based on secondary evidence; this flyer is contemporary advertising evidence for it, though it does not state the year independently.
Generation X / The Jolt — 2 April 1978 event record → · Chancellor Hall 1978 Sunday sweep → · Chancellor Hall archive