Can somebody please explain how there are 123 days between dates (05/06/02 - 09/06/02) and 184 days between (05/06/02 - 11/06/02)? I am confused about how to calculate how many days there are between each month using the methods shown above in this answer. Will give thumbs up for full explanation Thanks.

2. The last coupon has been delivered on 05/06/02. There are 123 days between 05/06/02 and 09/06/02, and 184 days between the last coupon date (05/06/02) and the next coupon date (11/06/02). Hence, the accrued interest is equal to $26.739 123 Accrued Interest x $40 = $26.739 184