Peace be upon you. If someone travels for a month each year, their prayer status depends on their intention. According to Ayatollah Khamenei, if the person intends to continue this work every year, they should pray completely even during their first travel. However, if they do not intend to continue, they should shorten their prayers. According to Ayatollah Sistani, those who travel every year and spend the rest of the year in their homeland have different rulings based on the duration of their travel. If their travel lasts three months or more, they should pray completely. If it is less than two months, they should shorten their prayers. If it falls between these durations, it is recommended to combine both complete and shortened prayers. May you be successful in all good.