A bit late this year, but better late than never, right? ^^

2016 Harry Potter Fests

January:
kink_n_squick's 2015/16 Creatures Fest Masterlist
severus_snape 2016 Master List
rarepair_shorts 2016 Master List

February:
hprare_cliche's Valentine's Fest Masterlist
snape_potter's Valentine's Comment Fest Masterlist
hp_kinkfest's Round 7 Masterlist
hp_3somes - no fest announced
hp_darkarts's 2016 My Bloody Valentine Masterlist

March:
hd_remix Vol. 8.0 Masterlist
do_me_veela's 2016 Masterlist
ron_draco_fest 2016 Masterlist
hp_goldenage's 2016 Salt and Pepper fest Masterlist
hp_getlucky 2016 Get Lucky Masterlist
hp_shoreofangst Round One Masterlist

April:
daily_deviant's Banging Birthday Masterlist
hp_deflower 2016 TBA
dracotops_harry 2016 Masterlist
hp_darkarts's 2016 Horror Fest - no fest this year

May:
serpentinelion's 2016 Glomp Fest Masterlist
snape_potter's Snarry-a-Thon 2016 Masterlist
femmefest 2016 Masterlist
hp_mhealthfest 2016 Masterlist
harrydracompreg's 2016 Harry/Draco Mpreg Masterlist
dramionelove's 2016 MiniFest Masterlist

June:
hp_podfic_fest 2016 Masterlist
hd_smoochfest 2016 No fest this year :(
dracomalfoy's "Find Your Favourite Draco" Masterlist
hprarefest's 2016 Masterlist
rs_collab's 2016 Masterlist

July:
slythindor100's Harry/Draco LDWS - Round 8th Masterlist
hd_collab 2016 No Fest this year
harrylu 2016 TBA
sshg_promptfest's 2016 Masterlist
hd_cliche TBA
snape_potter Snarry Summer Challenge Masterlist
hd_tropes 2016 Masterlist

August:
severus_snape 2016 Summer of Severus Comment Fest Masterlist
sshg_smut 2016 SS/HG Smut Fest Masterlist.
hp_crossgenfest 2016 Masterlist
snarryglompfest Snarry Glomp Fest TBA
hptimetravel 2016 Masterlist
dramionelove 2016 Masterlist

September:
bbtp_challenge's Bring Back the Porn 2016 Masterlist
hd_familyfest 2016 Masterlist
dramione_remix's Dramione Remix Round 7 Masterlist
hp_drizzle 2016 Masterlist
dramione_duet's 2016 Masterlist
hd_eighthyear 2016 TBA
bottom_draco 2016 TBA
hp_silencio 2016 TBA
snaco_soiree 2016 - no fest

October:
hd_fan_fair 2016 H/D Pet Fair Masterlist
hd_hurtfest 2016 Masterlist
rs_games 2016 Masterlist
minerva_fest TBA
hp_creatures's 2016 Halloween Fest Masterlist
hp_adoptaprompt 2016 TBA
hd_fluff's H/D Fluffy Halloween Masterlist
hp_darkages TBA
birdsofshore's 2016 Rectober runs through October
hp_halloween's Annual HP Halloween Double Drabble 2016 Tag
interhouse_fest's 2016 Masterlist

November:
hp_nextgen_fest's 2016 Masterlist
hd_fanart's 2016 H/D Fanart Fest Masterlist
hp_sexstars TBA ??
hermione_smut 2016 TBA
bill_ficathon 2016 Will post Nov, 29th (on Bill's Birthday!)
sirius_black 2016 Dog Days of Summer Masterlist
hp_humpdrabbles's 2016 Annual Humpathon TBA, but this community has weekly prompt challenges

December:
hd_erised's 2016 is posting right now
hd_owlpost's 2016 is posting right now
mini_fest is posting right now
charlieficathon's Charlie's Birthday Month TBA
slythindor100's 25 Days of Harry and Draco runs through December is posting right now
dracoharry100's 2016 Christmas Challenge is posting right now
smutty_claus 2016 is posting right now
rs_small_gifts is posting right now
sshg_giftfest is posting right now
hoggywartyxmas posts in December
daily_deviant's Kinky Kristmas 2016 posts in December
snape_potter' 2016 Secret Snarry swap posting right now
adventdrabbles's 2016 Advent Drabbles posting right now


For the 2015 Masterlists you can go here and for only Harry/Draco please check vaysh's Harry/Draco Fests in 2016.

And of course, for all current fests potterfests is the place to go.

Phew! ^^ I'll add the dates to the fests as soon as they are announced. And if I neglected to include a fest, please, please let me know. I'd love to add it. :)