How to Use the DATE Worksheet on the BA II Plus

DT1, DT2, DBD — plus a 2ND SET toggle between actual-calendar and US 30/360 (NASD) day counts. Accrual math for bonds and loans starts here.

Step by step

  1. 1

    Open DATE and enter DT1

    2ND + 1; type the first date as MM.DDYYYY and [ENTER].

    [2ND][DATE]3.152026[ENTER]

  2. 2

    Enter DT2

    [↓] then the second date the same way.

    [↓]12.312026[ENTER]

  3. 3

    Choose ACT or 360

    [↓] lands on DBD; [↓] again reaches the basis row, 2ND SET toggles ACT ↔ 360.

  4. 4

    CPT the days

    [↑] back to DBD and [CPT].

    [↑][CPT]

Worked example (T10): 291 vs 286 days

March 15, 2026 → December 31, 2026: ACT counts 291 calendar days. 30/360 (NASD) keeps D2 = 31 (because D1 = 15 < 30) and counts 30×9 + 16 = 286.

[2ND][DATE]3.152026[ENTER][↓]12.312026[ENTER][↓][CPT]

Web practice cannot replace the physical calculator in a proctored exam — only calculators on the exam organizer’s current list are allowed.

Frequently asked questions

Which convention do I pick?

+

Corporate/municipal bonds and many loans accrue on 30/360; Treasuries and money-market instruments usually use ACT. Match the instrument’s documentation.

What exactly does NASD adjust?

+

If D1 = 31 it becomes 30; if D2 = 31 and D1 ≥ 30 then D2 becomes 30. Everything else is straight 30-day months and 360-day years.

Date →All calculators →All guides →