All margins in APA format are set at 1 inch.
A header in a paper is a section at the top of each page that contains information such as the author's name, the title of the paper, and the page number. It is typically formatted with the text aligned to the right margin and may include a running head with a shortened version of the title.
To create an APA formatted title page, you need to include the title of your paper, your name, your institution's name, and the date. The title should be centered, written in title case, and not exceed 12 words. Your name and institution should be centered below the title. The date should be aligned to the right.
A right margin on a paper refers to the empty space along the right edge of the text. It helps to separate the text from the edge of the paper and improve readability. In most cases, the right margin is aligned with the left margin to create a clean and balanced look on the page.
The default alignment for text is to have it left aligned.
Left aligned and not justified
In a full block format letter, the date will be justified at the left margin. In a modified block format letter, the date will be tabbed one third to one half of the page to the right.
Right justified means that the type in a paragraph is vertically aligned on the right side of the page or column. Most type is set left justified and is easier to read due to reading from left to right.
In a shell you have a prompt that is right justified and one that is left justified.
The date should be placed in the top right corner of the APA paper, aligned with the right margin. It should be written in the format: Month Day, Year.
If you are reading this answer in English then the answer is right justified.
Right-justified - is aligning text to the right-hand margin.
It is text that extends fully between the left and right margin; justified both left and right at the same time.