A motion for extension of time asks the court to push back a filing deadline — a response to a motion, a discovery deadline, or a briefing schedule. It's usually straightforward, but only if filed correctly and early.
File before the deadline passes, not after
A motion filed before the original deadline is treated very differently from one filed after it's already passed — the latter often has to also explain and excuse the missed deadline itself, a much harder showing.
State a real reason
Court schedules, discovery complications, a witness's unavailability, or the sheer volume of material to review are legitimate reasons — courts generally want more than 'additional time is needed' without context.
Note whether the other side agrees
An unopposed request for a reasonable extension is typically granted quickly, often without a hearing. Noting the other side's position — and that you asked — makes the motion far easier for a judge to grant.
Propose a specific new deadline
A motion asking for 'more time' without a specific proposed date creates extra work for the court. Suggesting a concrete new deadline speeds up the ruling.