Because there is no definition of this date in national holidays, if your girlfriend is a romantic person, she may know that it is best for you to express your love to her. She will feel that you are very romantic. If you can bring a gift to express it, she will like it more. There is no requirement for the gift. I think as long as she likes it, it will be fine. You can think about what she wants recently or has always wanted. If you give it to her at this time and say I love you to her, she may be very touched. For example, clothes, shoes, cosmetics, jewelry and the like that she usually buys, girls never have too much of these things, it will be very practical and effective. If there is nothing to give, it is also okay to send a bouquet of flowers to express it. If you can enter the wedding, then you propose to her on this day and promise to love her for life. Maybe she will accept it, which is also a good idea.