Modern

A lot of new players always think they can use any card for their modern deck. So for those folks that struggle picking sets, here's a List of sets permitted in Modern tournaments:

• Eighth Edition
• Mirrodin
• Darksteel
• Fifth Dawn
• Champions of Kamigawa
• Betrayers of Kamigawa
• Saviors of Kamigawa
• Ninth Edition
• Ravnica: City of Guilds
• Guildpact
• Dissension
• Coldsnap
• Time Spiral
• Planar Chaos
• Future Sight
• Tenth Edition
• Lorwyn
• Morningtide
• Shadowmoor
• Eventide
• Shards of Alara
• Conflux
• Alara Reborn
• Magic 2010
• Zendikar
• Worldwake
• Rise of the Eldrazi
• Magic 2011
• Scars of Mirrodin
• Mirrodin Besieged
• New Phyrexia
• Magic 2012
• Innistrad
• Dark Ascension
• Avacyn Restored
• Magic 2013
• Return to Ravnica
• Gatecrash
• Dragon's Maze
• Magic 2014
• Theros
• Born of the Gods 
• Journey Into Nyx (effective May 2, 2014)

And of course the banned list:

• Ancestral Vision
• Ancient Den
• Blazing Shoal
• Bloodbraid Elf
• Chrome Mox
• Cloudpost
• Dark Depths
• Deathrite Shaman (banned effective February 7, 2014
• Dread Return
• Glimpse of Nature
• Golgari Grave-Troll
• Great Furnace
• Green Sun's Zenith
• Hypergenesis
• Jace, the Mind Sculptor
• Mental Misstep
• Ponder
• Preordain
• Punishing Fire
• Rite of Flame
• Seat of the Synod
• Second Sunrise
• Seething Song
• Sensei's Divining Top
• Stoneforge Mystic
• Skullclamp
• Sword of the Meek
• Tree of Tales
• Umezawa's Jitte
• Vault of Whispers