This small blue appointment diary was kept in the Assistant Private Secretary's office, in the Prime Ministerial suite at Parliament House, during Harold Holt's second year as Prime Minister. A similar, more complete, brown diary (A2587, item 2) was kept in the office of his Private Secretary. The diaries were used as a check against each other to avoid missed or conflicting appointments.

Entries in this diary cover VIP visitors, meetings with Ministers, diplomats and others, Holt's VIP travel, Cabinet meetings, House of Representatives sittings, the Premiers' Conference, official and social engagements. The diaries were transferred to archival custody in December 1971.