1260 Days
The woman symbolizes the nation of Israel
The man child symbolizes the 144, 000 Jews.
The time span of 1260 days is also known as 42 months or three and a half years or times times times and a half.
Background Reading:
Revelation 12:6 and 12:13-14
The 1260 Days
12:6 The woman fled into the desert to a place prepared for her by God, where she might be taken care of for 1,260 days.
and
Persecution and Flight of Israel for 3.5 years (v6, refs)
12:13 When the dragon saw that he had been hurled to the earth, he pursued the woman who had given birth to the male child. 14 The woman was given the two wings of a great eagle, so that she might fly to the place prepared for her in the desert, where she would be taken care of for a time, times and half a time, out of the serpent's reach.