From The Sims Wiki, a database for The Sims series that anyone can edit

Cheats
By game The Sims · The Sims 2 · The Sims 3 University · Nightlife · Open for Business · Pets · Seasons · Bon Voyage · FreeTime · Apartment Life · Mansion & Garden World Adventures
By type Build Cheats · Gameplay Cheats · Storytelling Cheats · Neighborhood Cheats · Miscellaneous Cheats
testingcheatsenabled Tombstone of Life and Death · Sim Modder · Rodney's Death Creator

[edit] The Sims 2 Seasons Cheats

(The Sims 2: Seasons Expansion Pack is required for these cheats)

[edit] Miscellaneous Cheats

• bugJarTimeDecay [on|off]

Should you catch any fireflies in a jar, enabling this cheat will make them live forever! (makes for alluring lighting!)