At-A-Glance Burkhart's day counter desk calendar refill tracks 12 months January-December and will help meet all your financial and scheduling needs. Refill computes interest, elapsed time on notes and maturity dates and includes an appointment section with half-hourly appointments from 8:00 a.m. - 5:30 p.m. For organized scheduling refill includes a call loan table, monthly loan table and 30 days period table for one year to help your financial needs. Also, the refill features a three year advance planning calendar for long range planning. Previous month block is on every page for quick reference and features U.S. Federal and Canadian holidays. The one tab per month ensures easy referencing of dates. 2 ring refill fits base E21. Page size: 4.5 in. X 7.38 in. Overall size: 4.75 in. X 7.38 in. X 1.38 in.