Is It Over Yet? solution
by Kegler

Six of the entries contain 8D's “ground HOG”, i.e., the letters HOG in some order; all three letters are
squeezed into a single square.  Analogously, 5D and 35A intersect at a square holding the letters TWO.
Per the instructions, “FEBRUARY TWO is special for GROUNDHOG PUNXSUTAWNEY PHIL.”

Is It Over Yet? solution grid

Across
1S(PORTFIS)H (PROFITS anag)
8G + APING
13T(R)EE
14REORGANIZE (RAZE REGION anag)
16LAB(R + AD)OR
17V + ANG{OGH} (GO HANG anag)
18A(VIATRI)X (TRIVIA anag)
20STOP (TOPS anag)
21PUNXSUTAWNEY PHIL
23ME{GOH}MS (GOES HMM anag)
26D{OGH}OUSE (OH GOD SUE anag)
29A + LA(CAR)TE
31THE + SP(I)AN
32TU(LI)P (PUT rev)
33AHOY (1st letters, &lit)
34TIERS (2 defs)
35LAS{TWO}RD (DRAW LOTS anag)
36GO + SLING
Down
1STRAP (PARTS rev)
2PREVUE (EVER UP anag)
3R + ELAX (AXLE anag)
4THreAT
5FEBRUARY {TWO}
6IR(RITAT)E (TRAIT anag)
7HO + D
8GROUNDHOG
9AGREE (EAGER anag)
10P + AVE
11NI(N)THS (HINTS anag)
12KE{OGH} PLANS (OK HELP SNAG anag)
15BI(N{GOH}A)LL (HOGAN anag)
19SWATHE (WHEATS anag)
22PUPIL (2 defs)
23MATE (2 defs)
24SAPS (PASS anag)
25M(E)AD
27{G + HO}STS
28EAR + N
30LUG (GULl rev)