The period of time a casino considers a single gaming day. Typically, the Slot Day day differs from the normal day and typically begins early in the morning rather than at midnight (perhaps to correspond with a shift change). The Slot Day is used (not the date) for comp rating purposes. At many casinos, the date on the W2-G is also based on the Slot Day, so that a jackpot won just after midnight on New Years is reported for "last year"
An IRS Tax form a casino issues to players who "win" under certain condition. For video poker, a W2-G must be issued for "wins" of $1200 or more. The $1200 threshold is fixed and independent of amount wagered. Ironically, a $5 50-play Video Poker machine (played at max-bet of $1250), a $1200 payout would represent a loss. To comply with the IRS law, Video Poker and slot machines "lock up" upon a $1200 or more "win" and the player must wait for a slot attendant to both unlock the machine (and return it to normal play conditions) and bring the tax form. Non-US residents (non-resident aliens) and players without proper identification (and do not produce a TIN) will have tax withholding taken from their W2-G payouts, while others can opt to receive the entire win. At many casinos, players can request a "reset" which may allow them to return to playing quicker had they had to wait to receive the tax form and payout in the normal means. Often resets are only available in high limit rooms. Players may also request a consolidated W2-G, in which case they will receive a single W2-G for all their jackpots for a specified period of time (usually the "slot day") rather then one W2-G for each win. In general, IRS Form 1099 are not given for Video Poker wins (unless the win involves a free drawing or lottery scenario). Neither a W2-G or 1099 are given for wins paid in "Free Play".
