Valentine’s Day is the traditional day in which people usually celebrate love and affection. It is an annual celebration held on February 14. In UK, sending card on that day has been a custom that has been going on at least 150 years. But valentine’s card is really different to cards for another occasion because for valentine’s cards, couples will give them each other and you can also send/receive anonymous card to anyone you secretly loves. It is also popular in UK on Valentine’s Day to send text messages but, it is not really the good way to declare your love to somebody. Except of cards, the commons gifts to give on Valentine’s Day are flowers and chocolate.But there are some interesting valentine's gifts that could be offered such as pampering session at a health club for a women and  a chance to test drive a ferrari for a men.Nowadays,Valentines's day celebration depend on couple; but many peoples to celebrate this day,they went to a restaurant,eat whith candle in a romantic way.Other peoples prefer to participates in valentine's day dance parties or balls usually organised by clubs or hotels.Cinema is also an option to celebrated the Valentine's day

St David's day is the tradional day of the Welsh ccelebrated in Wales on 1 March, in honour of St David (Dewi Sant), the patron saint of Wales.
Saint David (Dewi Sant:welsh name) was living in the sixth century,son of Non(daughter of a local chieftain and niece of King Arthur) and of Sant(son of Ceredig pronce of Ceredignon).The reason why the first of March celebrated as St David's day is because he is reputed to have died on the first of march 589 and the same day,the monastary is said to have been "filled with angels as Christ received his soul".There are two Welsh symbols which are traditionally associated with St David's day :the Leek(Saint David's personal symbol) and the Daffodil(a generic Welsh symbol which is in season during March).
Every year parades are held in Wales to commemorate St. David. The largest of these is held in Cardiff. Celebrations included concerts, a parade and a food festival.Many Welsh people wear one or both of the national emblems of Wales to celebrate St. David or they could also wear the Welsh traditional costumes and this costume consists of a long woollen skirt, white blouse, woollen shawl and a Welsh hat:for girls.

Referenses: http://www.welsh-costume.co.uk/,http://sucs.org/~rhys/stdavid.html,
http://www.stvalentinesday.org/valentines-day-celebration.html