The event that is NOT considered for the time being of Viceroy Lord Lytton is the Burma War (option B). Here is an explanation of this answer:

Second Afghan War (option A):
- The Second Afghan War took place from 1878 to 1880.
- It was a conflict between the British Empire and Afghanistan, triggered by concerns over Russian influence in the region.
- Lord Lytton was appointed Viceroy of India in 1876, and during his tenure, the Second Afghan War was a significant event that he had to deal with.

Arms Act (option C):
- The Arms Act was passed in 1878 under Lord Lytton's administration.
- It aimed to regulate the possession, manufacture, and sale of firearms in British India.
- The Act was introduced in response to the rising discontent and unrest in the country, particularly in the aftermath of the Indian Rebellion of 1857.
- It was a crucial policy implemented during Lord Lytton's time as Viceroy.

Press Act (option D):
- The Press Act, also known as the Vernacular Press Act, was passed in 1878.
- It was another significant policy introduced during Lord Lytton's administration.
- The Act aimed to control the Indian vernacular press by imposing restrictions on newspapers that criticized British policies or promoted nationalist sentiments.
- The Act faced widespread opposition and was considered draconian by many, leading to further resentment against British rule.

Burma War (option B):
- The Burma War did not occur during Lord Lytton's time as Viceroy.
- The Third Anglo-Burmese War, which resulted in the annexation of Burma by the British Empire, took place from 1885 to 1886, after Lord Lytton had already left India.
- Therefore, the Burma War is not considered for the time being of Viceroy Lord Lytton.

In conclusion, while the Second Afghan War, Arms Act, and Press Act were significant events and policies during Lord Lytton's tenure as Viceroy, the Burma War did not occur during his time in India.