Questions & Answers about Jamás olvidaré ese día.
Putting jamás first gives it emphasis. It makes the sentence sound stronger, a bit like stressing never in English.
So:
- Jamás olvidaré ese día. = emphatic, dramatic, firm
- No olvidaré jamás ese día. = also correct, slightly more neutral in structure
In Spanish, words like jamás and nunca can come before the verb and make the sentence negative by themselves, so you do not need no if they are placed before the verb.
They both usually mean never.
In many situations, they are interchangeable:
- Jamás olvidaré ese día.
- Nunca olvidaré ese día.
However, jamás often sounds a little:
- stronger
- more emphatic
- sometimes more literary or dramatic
Nunca is very common in everyday speech.
Jamás is also common, but it can feel more forceful here.