API - fromGregorianDate giving one day ahead

[nithincvpoyyil]

kollavarsham.fromGregorianDate(new Date()) gives me below date, but actual malayalm calender showing date as '28'

{
"_naksatra": {
"saka": "P-bhadrapada",
"enMalayalam": "Poororuttathi",
"mlMalayalam": "പൂരുരുട്ടാതി"
},
"year": 1196,
"month": 7,
"date": 29,
"gregorianDate": "2021-03-12T15:36:22.094Z",
"julianDay": 2459286,
"ahargana": 1870820,
"sauraMasa": 10,
"sauraDivasa": 29,
"sakaDate": {
"_naksatra": {
"saka": "P-bhadrapada",
"enMalayalam": "Poororuttathi",
"mlMalayalam": "പൂരുരുട്ടാതി"
},
"year": 1942,
"month": 10,
"date": 14,
"gregorianDate": "2021-03-12T15:36:22.094Z",
"julianDay": 2459286,
"ahargana": 1870820,
"sauraMasa": 10,
"sauraDivasa": 29,
"paksa": "Krsnapaksa",
"kaliYear": 5121,
"adhimasa": "",
"fractionalTithi": 0.7046195776476161,
"sunriseHour": 6,
"sunriseMinute": 3,
"originalAhargana": 1870820.2512182216
}
}

[nithincvpoyyil]

Date showing in another calender

[nithincvpoyyil]

Date by Kollavarsham.fromGregDate()