Friday night is not everybody's Friday night.

A calendar can show a blank afternoon that is already spoken for. Someone finishing a night shift may need to sleep. Someone starting at four may have a long trip and a household to organise first. The first useful question is not "When are you off?" It is "When would seeing each other actually fit?"

Ask for a usable window, not the whole rota.

You do not need access to a friend's work calendar. Ask for one or two realistic options once they know their schedule. Include the end time: "I can do Tuesday from eleven until twelve, near your station, or a call on Thursday after seven." Two concrete possibilities are easier to answer than a group chat containing everyone's unavailable dates.

If their rota comes out late, agree when to ask again. "Send me a day when next week is confirmed" can be more useful than repeatedly proposing Saturday. The person with the predictable schedule can also do some of the checking and travelling. Flexibility should not always mean the shift worker makes the sacrifice.

CCOHS recommends that family and friends understand and respect a shift worker's sleep needs. Treat sleep as occupied time when making a plan. Do not ask someone to cut a sleep period short because the rest of the group prefers brunch.

Count the parts outside the cafe.

Suppose you both have an hour at lunchtime. A cafe twenty minutes away in each direction leaves twenty minutes together. That might be fine if the trip is easy, but it is not the leisurely lunch the invitation suggests. Pick somewhere near the less flexible person, shorten the visit honestly, or choose another day.

Ask whether the person needs a meal, a change of clothes or a place to leave a work bag. Avoid deciding that someone coming off a shift will automatically want coffee, exercise or a full account of your week. "Would food and a quiet catch-up suit you, or would another day be better?" gives them a real choice.

A public venue also needs to be open at the relevant time. Check the actual day and hours before sending the address. A plan for breakfast at two in the afternoon is perfectly workable until you discover that the kitchen closes at one.

Give the smaller plan its own value.

A twenty-minute call does not have to become a substitute for the full Saturday you cannot arrange. It can simply be a twenty-minute call. Tell each other if you want a proper conversation or just company while doing something ordinary. Those are different invitations, and both can be welcome.

If a regular slot works, try it for a few weeks before treating it as permanent. A rotating schedule may make "the first free afternoon after your rota arrives" more realistic than "every Wednesday." Keep the arrangement easy to change without making either person renegotiate the friendship.

Voice messages and photos can keep a conversation going between meetings, provided there is no expectation of an immediate reply. Ask about notifications before assuming your own waking hours suit the other person. A message that can wait should be allowed to wait.

Have one ordinary way to cancel.

Agree what happens if a shift changes or someone is too tired. For a paid activity, check the booking terms before either person commits. For tea at home, a simple message may be enough. Do not book something non-refundable and then use the cost as a reason your friend must attend.

A useful cancellation contains what the other person needs to know: "I cannot make tomorrow. Please do not travel over. I will send you a new option when I have the next rota." It need not contain a courtroom defence of the working day.

If every attempt fails, discuss the arrangement directly. Perhaps calls work for now; perhaps you need a less frequent visit with more notice. The answer may be inconvenient. Knowing the real constraint still gives you more to work with than another cheerful "soon".