Nifty Bank Index(instrument_token: 260105) timestamp is completely wrong

Hi Team,

Why the timestamp of Nifty Bank Index is occurring as some date of1970 year. Also, Time is incorrect too. Please see below. I am fetching ticks using mode: Full

[ { tradable: false,
mode: 'full',
instrument_token: 260105,
last_price: 28945.65,
ohlc:
{ high: 28960.7, low: 28831.7, open: 28893.95, close: 28994.4 },
change: -0.16813591590100158,
timestamp: 1970-01-19T00:36:16.843Z } ]

Please Note : I am using Node js API