The January page of a year is shown. In which year after it will 1 January next fall on a Sunday?

1 January moves on 1 day after an ordinary year and 2 after a leap year: 2026 Thu → 2027 Fri → 2028 Sat → 2029 Mon (2028 is leap, so Sunday is skipped) → 2030 Tue → 2031 Wed → 2032 Thu → 2033 Sat (2032 is leap) → 2034 Sun. (2029 forgets the leap-year jump.)