One day is there of the series

One Day is there of the Series
Termed Thanksgiving Day -
Celebrated part at Table
Part, in Memory -

Neither Patriarch nor Pussy
I dissect the Play -
Seems it to my Hooded thinking
Reflex Holiday -

Had there been no sharp Subtraction
From the early Sum -
Not an Acre or a Caption
Where was once a Room -

Not a mention, whose small Pebble
Wrinkled any Sea,
Unto Such, were such Assembly,
'Twere Thanksgiving Day.