How long do you need to organise a group gift?

About three weeks is comfortable. Two is workable. Under a week, stop asking everyone and ask the two or three people most likely to reply within a day.

Almost none of that is production time. It is other people being slow, which is the only variable that actually matters.

Where the time goes

Not where people expect. The making is the predictable part; the collection is not, and it expands to fill whatever you give it.

A message sent on a Tuesday afternoon is read by most people that day and acted on by about a third. The rest need a reminder, and the reminder needs a couple of days to land. That cycle is what three weeks buys you: two passes at everybody, with slack.

Set a deadline earlier than the real one

Say the twelfth when you need it by the fifteenth. This is not manipulation, it is arithmetic — a stated deadline is treated as approximate by most people and the buffer absorbs that.

A concrete date also outperforms an open request by a wide margin. When you get a chance is read as no deadline and behaves accordingly.

The one-reminder rule

Tell people there is exactly one reminder coming, then send exactly one. It converts better than an open-ended ask because it tells them the shape of the commitment.

For a memorial, give longer and remind less — a month, and no more than twice. That material arrives over weeks rather than days and chasing it is the wrong instinct.

Which occasions move faster than others

Not all of them behave the same way, and the differences are large enough to plan around.

A reunion is the tightest: ask before everybody leaves the house, or within the week, because the group chat goes quiet fast and the photographs sink into camera rolls. A workplace collection is slower than a family one — people read the message at work, mean to do it later, and later is a different day.

A memorial is slowest of all and should be. Contributions arrive over weeks, not days, and the material is heavier, so chasing works against you.

If you have four days

Do not run a wide collection. Message two or three people individually, ask for one photograph and one line by tomorrow, and accept that the result will be narrower.

Or use what you already have. Is one photograph enough covers why the single-source version is a finished piece rather than a compromise, and how to get relatives to actually send you the photos covers the asking.