If you are looking for a job in IRELAND, the UK or the US, remember not to add personal data in you CV (date of birth, sex, marital status or even a profile picture!). Equal opportunity legislation in these countries requires employers to recruit based on merit alone, and emitting these data enables organisations to choose candidates fairly!
In these countries equal opportunities is given to all without any discrimination. The employer do not give importance in personal data. They focus on the candidates ability to work and they take completely based on the merit alone.