I’ve been invited to a Swedish Midsummer party, and frankly, I’m terrified. I’ve been told it involves eating raw fish, drinking copious amounts of home-made vodka and dancing round a big phallus while I pretend to be a frog. Does it?

Midsummer parties vary from the respectable and sober to the downright bawdy.

Singing, the eating of pickled herrings and the downing of shots of traditional flavoured brännvins are all considered to be good form.

For most Swedes, and most foreigners fortunate enough to experience it, it is simply the best party of the year.

What exactly are we celebrating?

Held on the evening of the Friday between June 19th and 25th, Midsummer marks the the longest day of the year. In Sweden, a country with dark winters and short summers, celebrating the light and the warmth is a natural thing to do.

Strong pagan elements to the festival persist, although their exact links to pre-Christian Sweden are hard to pin down. Pagan societies in northern Europe were known to celebrate summer solstice, but there are no sources to indicate exactly how pagan Midsummer celebrations in Sweden might have looked.

Attempts by the church to adapt the day to the feast of St. John the Baptist never really took off in Sweden, and celebrations retain a reassuringly profane feeling.

Where should I celebrate?

Not in the big cities, anyway. Midsummer is a definite outdoor activity, even if the summer weather traditionally gives way to rain just as Swedes are about to settle down to their smörgåsbord.

Most Swedes would picture a traditional Midsummer party being held in a little red cottage by a lake. If you don’t have an invitation to a Midsummer party, many hotels and towns organise celebrations, and the Skansen open air museum in Stockholm also holds events.

Is the maypole really a phallic symbol?

This rather depends on who you ask. Some claim that it actually symbolises an axis linking the world of the living to the underworld and the heavens in Norse mythology. Others, however, suspect that this is just a convenient explanation invented by prudes, and stick to the traditional story that it is a symbol for fertility. Which would explain why Swedish maypoles look so rude.

Maypoles are also common in Germany, Britain and France, and are believed to have been introduced to Sweden by Germans in the fourteenth or fifteenth century. Most other countries raise their maypoles in May, but Swedes wait until Midsummer. One explanation for this is that the leaves and flowers needed to decorate the poles aren’t made available until June by Sweden’s late-arriving summer.

What about this frog dance thing?

Ah yes, the song Små Grodorna is considered to be an important part of the Swedish national folk culture. Partygoers hop around the maypole in the style of frogs, singing the immortal words which translate as: “Little frogs are funny to look at/ They don’t have ears or tails”.

Goodness me, this brännvin must be dangerous stuff?

It certainly has a reputation for removing inhibitions. Sometimes things go a bit too far, and newspapers at Midsummer are guaranteed to contain stories about drunken brawls and worse.

One way to soak up the alcohol is to stock up at the smörgåsbord. This is where the raw fish comes in – the buffet usually includes herrings pickled in various different flavours. It also features smoked salmon, gravadlax, boiled potatoes (served with sour cream and dill), hard-boiled eggs with cod’s roe and strawberries – always Swedish, of course. A scrumptious strawberry cream cake might also make an appearance.

What should I wear to a Midsummer Party?

A garland of flowers is traditional, most commonly for women and children, but sometimes for men too.

Some people also wear folk costumes, corresponding to the part of the country they come from. This is very much restricted to the minority these days, however, and most people will turn up in their normal outdoor party gear.

What does folklore say about Midsummer?

There are plenty of myths surrounding the festival. One such myth is that if young people pick flowers at Midsummer they will dream of their future spouse.

On a more sinister note, it is said that people should be careful about swimming, for fear of falling victim to Näcken, the Evil Spirit of the Water. As with most myths, there’s something in it, although the name of the evil spirit causing swimmers trouble is far more likely to be O.P. Andersson.