Goodness, I'm not sure why it's not working for me, data is in "A2", and I've entered the array in "B2", confirming the formula has {} curly brackets....confusing.
Try this small modification in the array formula:
1*MID(A2,ROW(INDIRECT("1:1000")),1)),ROW(INDIRECT("1:1000")))),
MAX(IF(ISNUMBER(1*MID(A2,ROW(INDIRECT("1:1000")),1)),ROW(INDIRECT("1:1000"))))-
MIN(IF(ISNUMBER(1*MID(A2,ROW(INDIRECT("1:1000")),1)),ROW(INDIRECT("1:1000"))))+1)
Ps: verify if your date configuration in your Mac OS (not in Excel) is mm/dd/yyyy.
[TABLE="class: grid, width: 412"]
<tbody>[TR]
[TD][/TD]
[TD]A[/TD]
[TD]B[/TD]
[TD]C[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]
Date Like Txt or Other[/TD]
[TD]
DateLikeNumber[/TD]
[TD]
DateLikeDate[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD]
09/21/2018[/TD]
[TD="align: right"]
43364[/TD]
[TD="align: right"]
09/21/2018[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]10/01/2018[/TD]
[TD="align: right"]43374[/TD]
[TD="align: right"]10/01/2018[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD]11/01/2018[/TD]
[TD="align: right"]43405[/TD]
[TD="align: right"]11/01/2018[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD]
12/31/2018[/TD]
[TD="align: right"]
43465[/TD]
[TD="align: right"]
12/31/2018[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD]09/02/2018[/TD]
[TD="align: right"]43345[/TD]
[TD="align: right"]09/02/2018[/TD]
[/TR]
[TR]
[TD="align: right"]7[/TD]
[TD]
12/27/2018[/TD]
[TD="align: right"]
43461[/TD]
[TD="align: right"]
12/27/2018[/TD]
[/TR]
[TR]
[TD="align: right"]8[/TD]
[TD]11/02/2018[/TD]
[TD="align: right"]43406[/TD]
[TD="align: right"]11/02/2018[/TD]
[/TR]
[TR]
[TD="align: right"]9[/TD]
[TD]12/02/2018[/TD]
[TD="align: right"]43436[/TD]
[TD="align: right"]12/02/2018[/TD]
[/TR]
[TR]
[TD="align: right"]10[/TD]
[TD]09/03/2018[/TD]
[TD="align: right"]43346[/TD]
[TD="align: right"]09/03/2018[/TD]
[/TR]
[TR]
[TD="align: right"]11[/TD]
[TD]10/03/2018[/TD]
[TD="align: right"]43376[/TD]
[TD="align: right"]10/03/2018[/TD]
[/TR]
[TR]
[TD="align: right"]12[/TD]
[TD]11/03/2018[/TD]
[TD="align: right"]43407[/TD]
[TD="align: right"]11/03/2018[/TD]
[/TR]
[TR]
[TD="align: right"]13[/TD]
[TD]
12/23/2018[/TD]
[TD="align: right"]
43457[/TD]
[TD="align: right"]
12/23/2018[/TD]
[/TR]
[TR]
[TD="align: right"]14[/TD]
[TD]09/04/2018[/TD]
[TD="align: right"]43347[/TD]
[TD="align: right"]09/04/2018[/TD]
[/TR]
[TR]
[TD="align: right"]15[/TD]
[TD]10/04/2018[/TD]
[TD="align: right"]43377[/TD]
[TD="align: right"]10/04/2018[/TD]
[/TR]
[TR]
[TD="align: right"]16[/TD]
[TD]11/14/2018[/TD]
[TD="align: right"]43418[/TD]
[TD="align: right"]11/14/2018[/TD]
[/TR]
[TR]
[TD="align: right"]17[/TD]
[TD]12/04/2018[/TD]
[TD="align: right"]43438[/TD]
[TD="align: right"]12/04/2018[/TD]
[/TR]
[TR]
[TD]****[/TD]
[TD]*********************[/TD]
[TD]****************[/TD]
[TD]*************[/TD]
[/TR]
</tbody>[/TABLE]
Markmzz