[?] Different results between Mathematica and Wolfram|Alpha using DayCount?

[makdisse (Paulo Makdisse)]

Am I missing something?

[rohitnamjoshi]

Hi Paulo,

From the “Possible Issues” for DayCount

DayCount does not count the beginning date of the date range

[makdisse (Paulo Makdisse)]

TIL that “Possible Issues” holds important information.
Thanks for that Rohit!